Do we have any other instance of Return value 3?

In the registry,

Find

HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders\AppData
value=%APPDATA%

and change it to

HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders\AppData
value=%USERPROFILE%\AppData\Roaming

Install SEP client again.

Try this once
Symantec Endpoint Protection Client (SEP) installation fails and rolls back. Install log shows "( LUCHECK.EXE ) returned 206"

no other instance of return value 3.
I tried to install several times but still I fail to have it installed. Each time I install I delete the contents of this directory C:\Windows\Temp

I am attaching the whole log file instead.

Do you rebooted after making the above changes before doing installation?

If above suggestions not helps try by disabling UAC.....

I verified.. this reg key: %USERPROFILE%\AppData\Roaming and it is correct.

I have also done the cleanwipe utility and tried installing. I have done push installation and manual installation

Any other suggestions? The user is one of the Managers of the company. I cannot keep on holding his laptop (he doesnt like it)
or better if you can suggest a push installation procedure instead.

Remove liveupdate
Delete following folders if present
C:\Program Files\Symantec
C:\Program data\Symantec
C:\Program Files\Symantec AntiVirus
C:\Program Files\Common Files\Symantec Shared
C:\Documents and Settings\All Users\Application Data\Symantec
 
Also delete following reg keys
HKLM\Software\symantec
HKCU\Software\symantec
Disable UAC
Reboot the Laptop
Copy the installtion package to Hard drive 
Install SEP and try..

Check if the DCOM is set properly

 Incorrect permissions for LuComServer
- Start - Run - Dcomcnfg: Component Services, Computers, My Computer, DCOM Config, LuComServer,
- Select Properties, Identity tab
- Select the "This user" option
- Choose a Local Administrator account. Use the Browse button if necessary; the account name must be prefixed by machine name to be recognized.

i will check all suggestions posted above as soon as I have the laptop again. Thanks everyone. if there are other possible solution please post also. thanks again.

Hi none of the suggestions worked. Please look into the capture of the SEP log file below:

MSI (c) (6C:78) [14:16:52:122]: PROPERTY CHANGE: Deleting SECONDSEQUENCE property. Its current value is '1'.
Action ended 14:16:52: ExecuteAction. Return value 3.
MSI (c) (6C:78) [14:16:52:122]: Doing action: SetupCompleteError
Action 14:16:52: SetupCompleteError.
Action start 14:16:52: SetupCompleteError.
Action 14:16:52: SetupCompleteError. Dialog created
Action ended 14:16:57: SetupCompleteError. Return value 2.
Action ended 14:16:57: INSTALL. Return value 3.
MSI (c) (6C:78) [14:16:57:380]: Destroying RemoteAPI object.
MSI (c) (6C:A4) [14:16:57:380]: Custom Action Manager thread ending.
Property(C): DiskPrompt = [1]
Property(C): UpgradeCode = {24BF7A02-B60A-494B-843A-793BBC77DED4}
Property(C): CostingComplete = 1
Property(C): VersionNT = 600
Property(C): TARGETDIR = C:\

1. Uninstall symantec. Even it is not successfully installed, it still remain on your registry data. Run cleanwipe. Then restart workstation.
2. Try to stop - start the  Background Intelligent Transfer(BITS), Autoupdate.
3. Reinstall symantec

Thanks. but I already tried running cleanwipe several time. I also tried push installation, manual install. But the installation keeps on rolling back. I already disabled UAC in Vista 32bit SP2. The suggestion for "Incorrect permissions for LuComServer" above is not possible because LuComServer does not exist.