Don't know if you wanted me to post in the other forum, but since its so long time ago,
I don't see any point in posting a minidump error now.
I have MBA and SAS thats it. Both free versions, so no realtimescanners. Ooh and Windows Defender.
Regarding what happend.. I got BSOD
Only way around was safe mode, uninstalled Avast 5, reinstalled 4.8.
Everything fine again.