Help ! Virus.....

Hi, I am a new member here and I am posting this thread with a hope for a solve (Because I heard from my friend that this forum is good).

Problem 1 :

My problem started like 1/2 months ago. I think I got an UNKNOWN virus (I have not found any definition for the virus) from a pen drive. Because, after removing the pen drive I got “DESKTOP.INI” Only in the places mentioned below :

“C:\Documents and Settings\LocalService\Local Settings”
“C:\Documents and Settings\LocalService\Local Settings\History”
“C:\Documents and Settings\LocalService\Local Settings\History\History.IE5”
“C:\Documents and Settings\LocalService\Local Settings\temp\History\History.IE5”
“C:\Documents and Settings\LocalService\Local Settings\temp\Temporary Internet Files\Content.IE5”
“C:\Documents and Settings\LocalService\Local Settings\temp\Temporary Internet Files\Content.IE5\CVWOGE6A”
“C:\Documents and Settings\LocalService\Local Settings\temp\Temporary Internet Files\Content.IE5\HLYQFPBR”
“C:\Documents and Settings\LocalService\Local Settings\temp\Temporary Internet Files\Content.IE5\O99NJYA5”
“C:\Documents and Settings\LocalService\Local Settings\temp\Temporary Internet Files\Content.IE5\SSQUJH4O”
“C:\Documents and Settings\LocalService\Local Settings\Temporary Internet Files”
“C:\Documents and Settings\LocalService\Local Settings\Temporary Internet Files\Content.IE5”
“C:\Documents and Settings\NetworkService\Local Settings”
“C:\Documents and Settings<Username>\Local Settings” [This is only on my user account]

These files are only in the “C:/Documents and settings”. NOT ANYWHERE ELSE
The “DESKTOP.INI” files read :

[.ShellClassInfo]
LocalizedResourceName=@shell32.dll,-21774

I tried to clean them by “Start>Search” and delete them by “Shift+Delete”. But it comes back after every reboot. My PC is slower then ever. I checked the Microsoft support center solve (http://support.microsoft.com/kb/330132) but it didn’t work. Is there a solve for this problem?

Problem 2 :

After the attack of “DESKTOP.INI” the view of my windows folder has changed into a normal folder and the menu commands are missing. I could not install any new fonts on my operating system. I checked the Microsoft support center solve (http://support.microsoft.com/kb/133725) but it didn’t work. Is there a solve for this problem?

Problem 3 :

I got “WIN32:SALITY” on my PC. It is changing the *.exe files and disabling them. When I try to start the file it gives this message :

“ is not a valid Win32 Application.”

Then the virus was stacking the infected files into the System restore folder. I stopped system restore points. Still the files are changing.

The virus has also disabled the “Regedit” and “Task Manager”. But later on I used the program “ComboFix”. It released the “Task Manager” and “Regedit”. But my PC is still infected by Virus.

I am using Avast 4.8 Home Edition(Virus Definition Up-To-Date). It first detected the Virus but couldn’t disinfected the files and failed to remove the source file. I scheduled a Boot scan with Avast and it detected many exe files as infected and moved to virus chest. Then I made a mistake and uninstalled Avast without deleting the infected file and installed Kaspersky Antivirus 2009. It failed to detect any infected or source file. I installed McAfee Total Protection 2008. It also failed to detect any infected or source file. I reinstalled the Avast and with all my sorrow it failed to detect infected files. My PC is still slower then ever. I think the virus still in my PC. What should I do?

I am giving my PC Configuration for your Evaluation.

Processor : Intel Celeron D 2.66 Ghz, 256 KB L2 Cache, 533MHZ Front side bus
Motherboard : Gigabyte S-Series 945GZM-S2
Ram : 2 * 512 MB DDR2 (Bus Speed 533)
HDD : Samsung 160 GB SATA

Any one please give an advise and release me from virus attack.

Please, don’t post twice the same. Just double the help efforts.
Follow http://forum.avast.com/index.php?topic=45082.msg377462#msg377462