Thank you essexboy, it worked, avast reinstalled, perfect
Only to the original problmem, could it be a virus or somethnig wrong in Vista, with that crash by video streaming?
For example youtube, last 1-2 month, when watching CPU is on 100% and the video is "skipping" and yesterday PC two times colapsed. Never happened before. So I blamed avast, but it seems to be the problem somewhere els.
I tryed ccleaner, adwcleaner, but ther is no difference.
On more thing, when PC is still, CPU is skipping from 0 to 10% every 5 second...
I connected it to this process: WmiPrvSE.exe - NETWORK SERVICE - WMI Provider Host
But here my skills ends :/ I am suspicious of net framework and task manager, but thats all.
If you have any suggestions, I would be happy
Thank you for your help.
Zdenek
PS: fixlog attached