Infected computer, help

[force123]

Hello,

I've got this computer which logs off exactly after login. Like a loop. I searched for hours and it found some solutions. Tried some and was able to pass this. But the windows itself couldn't run any exe programs. It always said *.exe is not a valid win32 program. I searched again for this, scanned system with dr web. and malwarebytes. Drweb found many infected objects (Virut) and cured them all. But the main problem still existed.

Finally reinstalled win xp (sp2), pressed R for repair the previous versions. This time windows came up and everything seemed to work well. After 2-3 reboots, system again went to the login-logoff loop and '.exe is not a valid win32 application'.

Again I reinstall/repair winxp, and ran combofix this time.
Here are the logs. Thanks for your attention.

Malwarebyte log
Combofix log
HijackThis log (after combofix)

 

[johnb35]

If you have Virut, you just can't repair the OS. Virut is the nastiest infection you can ever get and CAN'T be cleaned. You must back up your data and format then reinstall windows.

Do not backup any exe files. Basically you are limited to pictures, music, and office documents.

 

[Vamilvas]

Here you go in the case you don't like the reformatting option, hopefully you can follow the guide and it works for you.
http://remove-malware.com/antimalware/my-tools/so-what-is-virut-and-why-is-it-sooooo-evil/

If you find that its difficult to understand the website has a very helpful forum with people more than willing to help.
http://remove-malware.com/forums/viewforum.php?f=23

 

[Fira]

Here is Kaspersky http://www.kaspersky.com/anti-virus_trial this might be able to help ; )