Hello, everbody, after long time 
Here is long description of problem, with dynamic story 
Monday afternoon: I downloaded some selfextracting file, and make avast-on-demand scan. Nothing found. Then…click…and chaos! Avast have poping every minute a warnings, troyan infection :(. I deleted every time, but it was some kind that replicate self. So, it was happening all the time, only solution was to let me kill some processes in task manager. I found some unknown of them and replication stopped.
Incident + 2h: Everything seems quite, and I starting full system thorough scan. Avast found 3 troyans:
Win32:Agent-GSA
Win32:Delf-CDI
Win32:Small-gen2
It clean them with success.
After 2 hours of scanning, system get crushed!!! First time I saw BSOD under XP SP2. Explanation, some error in file xpdt.sys
Monday, late night. I beginning new scan… after 2 hours, again crush. Same explanation.
Tuesday, morning: I begun scan in safe mode. After few hours, same thing. BSOD blaming xpdt.sys
Tuesday, afternoon. I searching for xpdt.sys on internet. I find software prevx1, they saying xpdt.sys is malware that they can fix. Downloading program… Scanning… Prevx1 have next results.
Malware that have been found and blocked to run:
FCABAX.DLL
GOS1C.TMP
MOVEE.EXE
OPLS.DLL.HOOK
WIN24.TMP.EXE
WINTFJ32(2).DLL
After that, it seems everything is OK, again. But 30 minutes ago, my comp had another crush.
IMPORTANT: I searched for xpdt.sys in safe mode to delete it manually, but I couldn’t find it in system32, altough it was reported there.
And I never succeed to have avast to complete it scanning. Every time computer crushed when avast was scanning in directory C:Windows.
After infection, my Ashampoo firewall was damaged (.exe file). I had to reinstall it.
Computer: Pentium IV 1.7 GHz, RAM 512 MB, hmmm… is that important… System XP Pro SP2.