Trojan.StartPage.K

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Discovered: March 11, 2005
Updated: February 13, 2007 12:35:14 PM
Type: Trojan Horse
Systems Affected: Windows


Trojan.StartPage.K is a Trojan horse that modifies the Internet Explorer start page settings and displays unsolicited advertisements.



Removing entries from the Hosts file
If this threat has modified the Windows Hosts file, there are two ways to remove these entries:

  • Install and run the current version of LiveUpdate. This will remove only the entries that refer to Symantec domains.
  • Manually edit the Hosts file and remove all the entries that the worm added.

To run the current version of LiveUpdate
  1. Click download LiveUpdate.

    Note:
    If you are not reading this Web page on the computer that is getting the error notice, the address for downloading the file is:

    ftp://ftp.symantec.com/public/english_us_canada/liveupdate/lusetup.exe

    If necessary, you can type this address into the address bar of the problem computer. Changes to the Hosts file will not stop you from getting to this site.

  2. Save the file to the Windows desktop.
  3. Double-click the lusetup.exe icon on the desktop to install LiveUpdate.
  4. Run LiveUpdate.
  5. Did you see the message "LU1860: LiveUpdate has detected a potential security compromise on your computer"?
    • If you did, let LiveUpdate "Remove these entries from the hosts files" (Recommended).
      This should allow LiveUpdate to run.
    • If you did not, that was not the cause of the problem. Return to the Removal section.


To manually edit the Hosts file and remove all the entries that the worm added

Note: The location of the Hosts file may vary and some computers may not have this file. For example, if the file exists in Windows 98, it will usually be in C:\Windows; and it is located in the C:\WINNT\system32\drivers\etc folder in Windows 2000. There may also be multiple copies of this file in different locations.


Follow the instructions for your operating system:
  • Windows 95/98/Me/NT/2000
    1. Click Start, point to Find or Search, and then click Files or Folders.
    2. Make sure that "Look in" is set to (C:) and that "Include subfolders" is checked.
    3. In the "Named" or "Search for..." box, type:

      hosts

    4. Click Find Now or Search Now.
    5. For each Hosts file that you find, right-click the file, and then click Open With.
    6. Deselect the "Always use this program to open this program" check box.
    7. Scroll through the list of programs and double-click Notepad.
    8. When the file opens, delete all the entries in Step Number 25 of the "Technical Details" section.
    9. Close Notepad and save your changes when prompted.

  • Windows XP
    1. Click Start > Search.
    2. Click All files and folders.
    3. In the "All or part of the file name" box, type:

      hosts

    4. Verify that "Look in" is set to "Local Hard Drives" or to (C:).
    5. Click More advanced options.
    6. Check Search system folders.
    7. Check Search subfolders.
    8. Click Search.
    9. Click Find Now or Search Now.
    10. For each Hosts file that you find, right-click the file, and then click Open With.
    11. Deselect the Always use this program to open this program check box.
    12. Scroll through the list of programs and double-click Notepad.
    13. When the file opens, delete all the entries in Step Number 25 of the "Technical Details" section.
    14. Close Notepad and save your changes when prompted.


Antivirus Protection Dates

  • Initial Rapid Release version March 11, 2005
  • Latest Rapid Release version November 20, 2016 revision 034
  • Initial Daily Certified version March 11, 2005
  • Latest Daily Certified version November 21, 2016 revision 001
  • Initial Weekly Certified release date March 16, 2005

Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Writeup By: Asuka Yamamoto

Discovered: March 11, 2005
Updated: February 13, 2007 12:35:14 PM
Type: Trojan Horse
Systems Affected: Windows


When Trojan.StartPage.K runs, it does the following:

  1. Creates the following copies of itself:

    • %System%\ALG32.EXE
    • %System%\SPOOLSVU.EXE

      Note: %System% is a variable that refers to the System folder. By default this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).

  2. Creates the following Browser Helper Object:

    %Windir%\htass.dll

    Note: %Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows or C:\Winnt.

  3. Creates the following file:

    %Windir%\HTASSUI.exe

  4. Changes the start page of Internet Explorer to "default.com".

  5. Adds the values:

    "ALG32" = "%System%\ALG32.EXE"
    "SPOOLSVU" = "%System%\SPOOLSVU.EXE"

    to the registry subkey:

    HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

    so that Trojan.StartPage.K runs every time Windows starts.

  6. Adds the value:

    "(Default)" = "HTDP Class"

    to the registry subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{9E6EC32A-7C19-4409-99E8-FC980BCDAF26}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\HTASS.HTDP
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\HTASS.HTDP.1

    to register the Browser Helper Object and to modify Internet Explorer settings.

  7. Adds the value:

    "(Default)" = "%Windir%\htass.dll"

    to the registry subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{9E6EC32A-7C19-4409-99E8-FC980BCDAF26}\InprocServer32
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{4677FF8F-7740-4A9C-9F5E-E93794A86E85}\1.0\0\win32

    to register the Browser Helper Object and to modify Internet Explorer settings.

  8. Adds the value:

    "(Default)" = "HTASS.HTDP.1"

    to the registry subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{9E6EC32A-7C19-4409-99E8-FC980BCDAF26}\ProgID
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\HTASS.HTDP\CurVer

    to register the Browser Helper Object and to modify Internet Explorer settings.

  9. Adds the value:

    "(Default)" = "{4677FF8F-7740-4a9c-9F5E-E93794A86E85}"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{9E6EC32A-7C19-4409-99E8-FC980BCDAF26}\TypeLib

    to register the Browser Helper Object and to modify Internet Explorer settings.

  10. Adds the value:

    "(Default)" = "HTASS.HTDP"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{9E6EC32A-7C19-4409-99E8-FC980BCDAF26}\VersionIndependentProgID

    to register the Browser Helper Object and to modify Internet Explorer settings.

  11. Adds the value:

    "(Default)" = "{9E6EC32A-7C19-4409-99E8-FC980BCDAF26}"

    to the registry subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\HTASS.HTDP\CLSID
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\HTASS.HTDP.1\CLSID

    to register the Browser Helper Object and to modify Internet Explorer settings.

  12. Adds the value:

    "(Default)" = "HTASS 1.0 Type Library"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{4677FF8F-7740-4A9C-9F5E-E93794A86E85}\1.0

    to register the Browser Helper Object and to modify Internet Explorer settings.

  13. Adds the value:

    "(Default)" = "0"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{4677FF8F-7740-4A9C-9F5E-E93794A86E85}\1.0\FLAGS

    to register the Browser Helper Object and to modify Internet Explorer settings.

  14. Adds the value:

    "(Default)" = "%Windir%"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{4677FF8F-7740-4A9C-9F5E-E93794A86E85}\1.0\HELPDIR

    to register the Browser Helper Object and to modify Internet Explorer settings.

  15. Adds the values:

    "MSMsgSvc" = ""
    "SEHLPstp" = ""
    "WTLBAstp" = ""

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main

    to register the Browser Helper Object and to modify Internet Explorer settings.

  16. Adds the value:

    "{9E6EC32A-7C19-4409-99E8-FC980BCDAF26}" = ""

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects

    to register the Browser Helper Object and to modify Internet Explorer settings.

  17. Adds the value:

    "(Default)" = "IDOMPeek"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE}

    to register the Browser Helper Object and to modify Internet Explorer settings.

  18. Adds the value:

    "(Default)" = "{00020424-0000-0000-C000-000000000046}"

    to the registry subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D}\ProxyStubClsid
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D}\ProxyStubClsid32HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE}\ProxyStubClsid
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE}\ProxyStubClsid32

    to register the Browser Helper Object and to modify Internet Explorer settings.

  19. Adds the values:

    "(Default)" = "{4677FF8F-7740-4A9C-9F5E-E93794A86E85}"
    "Version" = "1.0"

    to the registry subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE}\TypeLib
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D}\TypeLib

    to register the Browser Helper Object and to modify Internet Explorer settings.

  20. Adds the value:

    "(Default)" = "IDocEventHandler"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D}

    to register the Browser Helper Object and to modify Internet Explorer settings.

  21. Adds the values:

    "HTAssADutid" = "0x4134CCF1"
    "HTAssutid" = "0x4134CFCB"
    "HTAssittid" = "0x4134CD73"
    "HTAssistid" = "0x4134CD73"
    "HTAssiftid" = "0x4134CE3B"
    "HTAssID" = "0x989681"
    "HTAssBnxt" = "0x4134DFCF"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main

    to register the Browser Helper Object and to modify Internet Explorer settings.

  22. Adds the values:

    "DisplayName" = "HTAss Library"
    "UninstallString" = "%Windir%\HTASSUI.exe"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\HTAssLib

    to register the Browser Helper Object and to modify Internet Explorer settings.

  23. Adds the value:

    "Start Page" = "http:/ /default.home"

    to the registry subkeys:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer\Main
    HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main

    to register the Browser Helper Object and to modify Internet Explorer settings.

  24. Deletes the following registry subkey:

    HKEY_CLASSES_ROOT\PROTOCOLS\Handler\ms-its

  25. Overwrites the following hosts files with the text "127.0.0.1     localhost":

    • %Windir%\hosts
    • %System%\Drivers\Etc\hosts

  26. Redirects all URLs to the rightsearch.cc domain.

  27. May display a message containing the following text:

    Title: Access Blocked - Virus Warning!

    Note: If the user clicks on the button, the Trojan will open a browser window and display a Web site on the securitycenter.cc/spyware domain.

  28. Periodically displays Pop-up windows of pornographic images.


Recommendations

Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":

  • Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
  • Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
  • Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
  • Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
  • Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
  • Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
  • If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
  • Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
  • Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
  • Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
  • Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
  • If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device's visibility is set to "Hidden" so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to "Unauthorized", requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.
  • For further information on the terms used in this document, please refer to the Security Response glossary.

Writeup By: Asuka Yamamoto

Discovered: March 11, 2005
Updated: February 13, 2007 12:35:14 PM
Type: Trojan Horse
Systems Affected: Windows


The following instructions pertain to all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.

  1. Disable System Restore (Windows Me/XP).
  2. Update the virus definitions.
  3. Run a full system scan and delete all the files detected as Trojan.StartPage.K.
  4. Delete the value that was added to the registry.
For specific details on each of these steps, read the following instructions.

1. To disable System Restore (Windows Me/XP)
If you are running Windows Me or Windows XP, we recommend that you temporarily turn off System Restore. Windows Me/XP uses this feature, which is enabled by default, to restore the files on your computer in case they become damaged. If a virus, worm, or Trojan infects a computer, System Restore may back up the virus, worm, or Trojan on the computer.

Windows prevents outside programs, including antivirus programs, from modifying System Restore. Therefore, antivirus programs or tools cannot remove threats in the System Restore folder. As a result, System Restore has the potential of restoring an infected file on your computer, even after you have cleaned the infected files from all the other locations.

Also, a virus scan may detect a threat in the System Restore folder even though you have removed the threat.

For instructions on how to turn off System Restore, read your Windows documentation, or one of the following articles:
Note:
When you are completely finished with the removal procedure and are satisfied that the threat has been removed, re-enable System Restore by following the instructions in the aforementioned documents.

For additional information, and an alternative to disabling Windows Me System Restore, see the Microsoft Knowledge Base article, "Antivirus Tools Cannot Clean Infected Files in the _Restore Folder ," Article ID: Q263455.


2. To update the virus definitions
Symantec Security Response fully tests all the virus definitions for quality assurance before they are posted to our servers. There are two ways to obtain the most recent virus definitions:
  • Running LiveUpdate, which is the easiest way to obtain virus definitions: These virus definitions are posted to the LiveUpdate servers once each week (usually on Wednesdays), unless there is a major virus outbreak. To determine whether definitions for this threat are available by LiveUpdate, refer to the Virus Definitions (LiveUpdate).
  • Downloading the definitions using the Intelligent Updater: The Intelligent Updater virus definitions are posted daily. You should download the definitions from the Symantec Security Response Web site and manually install them. To determine whether definitions for this threat are available by the Intelligent Updater, refer to the Virus Definitions (Intelligent Updater).

    The Intelligent Updater virus definitions are available: Read "How to update virus definition files using the Intelligent Updater" for detailed instructions.

3. To scan for and delete the infected files
  1. Start your Symantec antivirus program and make sure that it is configured to scan all the files.
  2. Run a full system scan.
  3. If any files are detected as infected with Trojan.StartPage.K, click Delete.

    Note:
    If your Symantec antivirus product reports that it cannot delete an infected file, Windows may be using the file. To fix this, run the scan in Safe mode. For instructions, read the document, "How to start the computer in Safe Mode." Once you have restarted in Safe mode, run the scan again.

    After the files are deleted, restart the computer in Normal mode and proceed with section 4.

    Note: If you see an error, such as LU1418, when you try to run LiveUpdate and you cannot get the Web site hosting the Intelligent Updater, it is likely that the Trojan has modified the Hosts file. You can either download and install LiveUpdate 2.5, which can remove Symantec entries from that file, or you can edit it yourself. See the instructions for both in the "Additional Information" section below.
4. To delete the value from the registry
Important: Symantec strongly recommends that you back up the registry before making any changes to it. Incorrect changes to the registry can result in permanent data loss or corrupted files. Modify the specified subkeys only. Read the document, "How to make a backup of the Windows registry ," for instructions.
  1. Click Start > Run.
  2. Type regedit

    Then click OK.

  3. Navigate to the subkey:

    HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

  4. In the right pane, delete the values:

    "ALG32" = "%System%\ALG32.EXE"
    "SPOOLSVU" = "%System%\SPOOLSVU.EXE"

  5. Navigate to the subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{9E6EC32A-7C19-4409-99E8-FC980BCDAF26}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\HTASS.HTDP
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\HTASS.HTDP.1

  6. In the right pane, delete the value:

    "(Default)" = "HTDP Class"

  7. Navigate to the subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{9E6EC32A-7C19-4409-99E8-FC980BCDAF26}\InprocServer32
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{4677FF8F-7740-4A9C-9F5E-E93794A86E85}\1.0\0\win32
  8. In the right pane, delete the value:

    "(Default)" = "%Windir%\htass.dll"

  9. Navigate to the subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{9E6EC32A-7C19-4409-99E8-FC980BCDAF26}\ProgID
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\HTASS.HTDP\CurVer

  10. In the right pane, delete the value:

    "(Default)" = "HTASS.HTDP.1"

  11. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{9E6EC32A-7C19-4409-99E8-FC980BCDAF26}\TypeLib

  12. In the right pane, delete the value:

    "(Default)" = "{4677FF8F-7740-4a9c-9F5E-E93794A86E85}"

  13. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{9E6EC32A-7C19-4409-99E8-FC980BCDAF26}\VersionIndependentProgID

  14. In the right pane, delete the value:

    "(Default)" = "HTASS.HTDP"

  15. Navigate to the subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\HTASS.HTDP\CLSID
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\HTASS.HTDP.1\CLSID

  16. In the right pane, delete the value:

    "(Default)" = "{9E6EC32A-7C19-4409-99E8-FC980BCDAF26}"

  17. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{4677FF8F-7740-4A9C-9F5E-E93794A86E85}\1.0

  18. In the right pane, delete the value:

    "(Default)" = "HTASS 1.0 Type Library"

  19. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{4677FF8F-7740-4A9C-9F5E-E93794A86E85}\1.0\FLAGS

  20. In the right pane, delete the value:

    "(Default)" = "0"

  21. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{4677FF8F-7740-4A9C-9F5E-E93794A86E85}\1.0\HELPDIR

  22. In the right pane, delete the value:

    "(Default)" = "%Windir%"

  23. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main

  24. In the right pane, delete the values:

    "MSMsgSvc" = ""
    "SEHLPstp" = ""
    "WTLBAstp" = ""

  25. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects

  26. In the right pane, delete the value:

    "{9E6EC32A-7C19-4409-99E8-FC980BCDAF26}" = ""

  27. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE}

  28. In the right pane, delete the value:

    "(Default)" = "IDOMPeek"

  29. Navigate to the subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D}\ProxyStubClsid
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D}\ProxyStubClsid32
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE}\ProxyStubClsid
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE}\ProxyStubClsid32

  30. In the right pane, delete the value:

    "(Default)" = "{00020424-0000-0000-C000-000000000046}"

  31. Navigate to the subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE}\TypeLib
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D}\TypeLib

  32. In the right pane, delete the values:

    "(Default)" = "{4677FF8F-7740-4A9C-9F5E-E93794A86E85}"
    "Version" = "1.0"

  33. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D}

  34. In the right pane, delete the value:

    "(Default)" = "IDocEventHandler"

  35. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main

  36. In the right pane, delete the values:

    "HTAssADutid" = "0x4134CCF1"
    "HTAssutid" = "0x4134CFCB"
    "HTAssittid" = "0x4134CD73"
    "HTAssistid" = "0x4134CD73"
    "HTAssiftid" = "0x4134CE3B"
    "HTAssID" = "0x989681"
    "HTAssBnxt" = "0x4134DFCF"

  37. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\HTAssLib

  38. In the right pane, delete the values:

    "DisplayName" = "HTAss Library"
    "UninstallString" = "%Windir%\HTASSUI.exe"

  39. Navigate to the subkeys:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer\Main
    HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main

  40. In the right pane, delete the value:

    "Start Page" = "http:/ /default.home"

  41. Exit the Registry Editor.

5. To reset the Internet Explorer home page
    1. Start Microsoft Internet Explorer.
    2. Connect to the Internet, and then go to the page that you want to set as your home page.
    3. Click Tools > Internet Options.
    4. In the Home page section of the General tab, click Use Current > OK.
    For additional information, or if this procedure does not work, read the Microsoft® Knowledge Base article: Home Page Setting Changes Unexpectedly, or You Cannot Change Your Home Page Setting, Article ID 320159.
      To reset the Internet Explorer Search page
      Follow the instructions for your version of Windows.

      Windows 98/Me/2000
      1. Start Microsoft Internet Explorer.
      2. Click the Search button on the toolbar.
      3. In the Search pane, click Customize.
      4. Click Reset.
      5. Click Autosearch Settings.
      6. Select a search site from the drop-down list, and then click OK.
      7. Click OK.

      Windows XP
      Because Windows XP is set by default to use animated characters in the search, how you do this can vary. Read all the instructions before you start.
      1. Start Microsoft Internet Explorer.
      2. Click the Search button on the toolbar.
      3. Do one of the following:
        • If the pane that opens looks similar to the following picture, click the word Customize and proceed to step h:




        • If the pane that opens has the words "Search Companion" at the top, and the center looks similar to the following picture, click the Change preferences link and proceed with step d.




      4. Click the Change Internet search behavior link.
      5. Under "Internet Search Behavior," click With Classic Internet Search.
      6. Click OK. Then close Internet Explorer. (Close the program for the change to take effect.)
      7. Start Internet Explorer. When the search pane opens, it should look similar to the following picture:





        Click the word Customize, and then proceed with the next step.

      8. In the Search pane, click Customize.
      9. Click Reset.
      10. Click Autosearch Settings.
      11. Select a search site from the drop-down list, and then click OK.
      12. Click OK.
      13. Do one of the following:
        • If you were using (or want to continue using) the "Classic Internet Search" panel, stop here (or proceed with the next section).
        • If you want to go back to the "Search Companion" search (it usually has an animated character at the button), proceed with step n.

      14. Click the word Customize again.
      15. In the "Customize Search Settings" window, click Use Search Companion > OK.
      16. Close Internet Explorer. The next time you open it, it will again use the Search Companion.


    Writeup By: Asuka Yamamoto