hi avast,
been a few days I’m experiencing the same thing, my pc damaged by things like this happen.
please try to re install the avast 
thanks, it works again ;D
This happened to me what did you do?
Try a clean install. Using http://www.avast.com/uninstall-utility
you are welcome
try to re install avast once again . 8)
Same issue, this will be the third full clean reinstall in the last month. Each time it goes from 340 to 350+ days left on the sub to trial not activated. Is there a real solution to this uninstall-reinstall every week other than changing to a different provider?
I don’t have problems for the past two weeks since I
did clean install (uninstall in safe mode).I guess everything
is OK,to knock on the wood.
The uninstall utility will ask if you want to boot into safe mode. Cool. 8)
I don’t know if uninstall utility will ask to boot in safe mode
'cos I started it from safe mode. 
hi avast and all,
My problem happened again today, by reinstalling avast running again but there is a problem when opening the updater in avast installation,
Avast V8 FREE Seems to get upset if you do a system restore in Win xp and is an ongoing issue it looses its config and turns into pro version and is a pain!!. As i had a system crash on V8 and had to restore the computer bsod boot loop!
I have gone back to V7 FREE From oldapps.com again as long as the virus definitions are uptodate then you are protected.
If you use V8 FREE to reset it you will have to use aswclear uninstal utility each time.