W32.Tendoolf - Removal

Delete files that are detected as W32.Tendoolf, remove the values that it added to the registry, and (Windows 95/98/Me only) remove the text that it added to the two Windows startup files.

To delete files that are detected as W32.Tendoolf:

1. Obtain the most recent virus definitions. There are two ways to do this:
   • Run LiveUpdate. LiveUpdate is the easiest way to obtain virus definitions. These virus definitions have undergone full quality assurance testing by Symantec Security Response and are posted to the LiveUpdate servers one time each week (usually Wednesdays) unless there is a major virus outbreak. To determine whether definitions for this threat are available by LiveUpdate, look at the Virus Definitions (LiveUpdate) line at the top of this write-up.
   • Download the definitions using the Intelligent Updater. Intelligent Updater virus definitions have undergone full quality assurance testing by Symantec Security Response. They are posted on U.S. business days (Monday through Friday). They must be downloaded from the Symantec Security Response Web site and installed manually. To determine whether definitions for this threat are available by the Intelligent Updater, look at the Virus Definitions (Intelligent Updater) line at the top of this write-up.
     
     Intelligent Updater virus definitions are available here. For detailed instructions on how to download and install the Intelligent Updater virus definitions from the Symantec Security Response Web site, click here.
     
2. Start Norton AntiVirus (NAV), and make sure that NAV is configured to scan all files. For instructions on how to do this, read the document How to configure Norton AntiVirus to scan all files.
3. Run a full system scan.
4. Delete all files that are detected as W32.Tendoolf.

To remove the values that W32.Tendoolf added to the registry:

CAUTION: Symantec strongly recommends that you back up the registry before you make any changes to it. Incorrect changes to the registry can result in permanent data loss or corrupted files. Modify only the keys that are specified. Read the document How to make a backup of the Windows registry for instructions.

1. Click Start, and click Run. The Run dialog box appears.
2. Type regedit and then click OK. The Registry Editor opens.
3. Navigate to each of the following keys:
   
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
   CurrentVersion\Run
   
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
   CurrentVersion\RunServices
   
4. In the right pane, delete the following value:
   
   Windows      C:\WINDOWS\KERNEL32.EXE
   
5. Click Registry, and click Exit.

To remove the text that W32.Tendoolf added to the Windows startup files:

NOTE: This is only necessary on Windows 95/98/Me.

1. Click Start, and click Run.
2. Type the following, and then click OK.
   
   edit c:\windows\win.ini
   
   The MS-DOS Editor opens.
   
   NOTE: If Windows is installed in a different location, make the appropriate path substitution.
   
3. In the [windows] section of the file, look for an entry similar to the following:
   
   load=C:\WINDOWS\KERNEL32.EXE
   
4. Select the entire line. Be sure that you have not selected any other text, and then press Delete.
5. Click File, and click Save.
6. Click File, and click Exit.
7. Click Start, and click Run.
8. Type the following, and then click OK.
   
   edit c:\windows\system.ini
   
   The MS-DOS Editor opens.
   
   NOTE: If Windows is installed in a different location, make the appropriate path substitution.
   
9. In the [boot] section, locate the following line:
   
   shell=explorer.exe C:\WINDOWS\KERNEL32.EXE
   
10. Delete the text to the right of shell=explorer.exe so that the line consists of only:
    
    shell=explorer.exe
    
11. Click File, and click Save.
12. Click File, and click Exit.

Technical Details