Kaspersky Antivirus corrupted, can't install it or Avast?

Hello,
I have a problem. After installing a program from internet (seemed to be a virus), the computer restarted after an alaram from Kaspersky, then when My Windows XP started, the kaspersky disappeared.

I tried to install it, but each time I try, it stops in the middle telling me it can't install the ----.exe file into the directory.

I tried to install Avast but after a final installation and a reboot, the Avast program wan't be able to run and the exe icon seems to be corrupted as its icon is like a DOS application icon and not a picture.

I followed some of ur suggestions to another posts and download both ComboFix.exe and avenger.exe.

I am attaching the ComboFix log file in here for you to suggest which lines should I add to avenger.exe (if this will only solve the problem).

Thank u in advance

 

Hereis the Log file

 

Pls somebody helps me. Now the problem is getting bigger. I startedto have a problem in internet explorer 6.

when I open ie6, it just open for 1 second and then closes itself