Help please: computer freezes forever after avast instalation

[gauth]

Hi, I installed Last Free Avast antivirus, ran scan, avast encourred some viruses, I deleted viruses, then scan stopped with a message saying a virus is active and I have to reboot. I allow to reboot and scan goes on in a blue background screen. Then it automatically reboot and freezes.

I tried to reboot about 20 times.

Each time, the system loads all the icons, seems ok but freezes BEFORE I CAN DO ANYTHING. Even ctrl-alt-del wouldn't help at all. Even the desktop icons nor taskbar icons failed to show up.

This also happen in safe mode !!!

Any suggestion to avoid a format C: ?

Thankyou very much

[.: L' arc :.]

Did you happen to have any other antivirus alongside avast?

[gauth]

Yes !

ESET - NOD32 with old database.

[.: L' arc :.]

It is not good to run two or more antiviruses alongside for this may cause system instability and conflicts.

Please decide on what to keep avast or NOD32? I'll post a step on how to fix this issue after knowing your choice on what to keep.

[gauth]

Avast is my choice.

Writing in this forum gave me luck... I finally managed to load the windows safe mode without freezing (it actually fails many times before). I ran ASWCLEAR, and then CCLEAR to first remove avast. Then I reboot in normal mode (virus remains) and removed ESET NOD32. I reboot and installed newly Avast. It is now running the boot time Avast scan.

I thing it will encounter this virus and solve the problem.

It would be very useful to add a check during avast installation for others antivirus previously installed and show an alert to newbies (like me) in case instability may happen. Anyway, I am happy with Avast.

Many thanks for your appreciated help.

[Pondus]

Maybe you have already done this, but it is recomended to run the NOD32 uninstall tool, found here at nr.21  to remove all leftovers
http://uninstallers.blogspot.com/

I thing it will encounter this virus and solve the problem.

If you have a virus also try Malwarebytes http://filehippo.com/download_malwarebytes_anti_malware/

[gauth]

ooh... the virus remains !!!

I had to use the Malwarebytes. It found 16 infected files. Delete+reboot=ok.

Thankyou very much to L'arc and Pondus