Avast Pro 4.8 won't start

This is what happened:

My brother started some downloaded program from internet. Then whole computer go nuts. First Avast Antivirus 4.8 Pro reported BAGLE trojan and GEN as I remeber. Next Avast! blank the screen with message some process is trying to shutdown avast service. I Immidiately shut down computer. Insert CD with Portable windows and scanned. I use BAGLE remover, BEAGLE remover, Alwil Avast Cleaner, Stinger, and online scanner at HouseCall (TrendMicro Site). After cleaning I started windows. BTW Windows won’t start in Safe neither Safe with command promp - BSOD.
When windows start avast icon dissapered, when I start manualy it will dipslay it with red block sign and when i point cursor dissapered again. When I go in Administrative tools services of avast are disabled, when I start them manualy they display error cannot start process. I’ve tried to uninstall Avast but he won’t. I downloaded little tool called avast uninstall tool, but no effect.
When I try to instal some other AV it displays error in installation. (AVG,Avira,NOD,Kaspersky)
Spybot cannot start, I’ve reinstalled him but still error WIN32 application. HiJackThis when installed immidiately turns his icon in win32 app (little blank window icon) and won’t start.

I’m thinking that I’m still infected please somebody help.
Thank You in Advance!


my system:
Windows XP Professional Service Pack 3
Build 2600.xpsp.080413-2111

my protection:
Alwil Avast! Antivirus 4.8 Professional
Spybot: Search & Destroy
SpywareBlaster
Billip WinPatrol

Hi…

Wowsers! :o

I would say it’s time to break out your (legal) Windows XP CD (or restore CD) and do a complete reinstall from scratch.

Best Regards…

OK I solved on my way, but anyway thanks for help ardvark :wink:

Here is my solution if somebody stuck like I am:

Go to avast directory/folder in your command prompt and use avast command line scanner.
OK, now avast will find some sytem drivers infected and can’t clean them.
Due the damaged safe mode I used paper and pencil and write down infected names.
Next I downloaded first what I found of PE System (Portable System) it was some free linux. (because my friend’s portable windows I returned)
Deleted troublemaker files, boot up my win and reinstalled avast. Scanned and clean some leftovers.

So I solved my problem, moderator please lock this I don’t need help anymore. But maybe will someone have problem like me and this is how I solved. Thank You all on time for reading this & helping me…

Greetings,
Branislav

Thanks for posting back your solution.
Welcome to avast forums.
Feel free to come back any time you need help or just to change experiences 8)