I just updated my avast premier to the latest version about 10 minutes ( 7.40 pm central standard time 5-12-2013 ) ago via the update interface in avast and was told to reboot, upon rebooting windows stopped with a black screen and the following error om my screen so i took out my camera and took a pic then i clicked ( ok ) on the error and my pc booted just fine and avast did update and seems to be running just fine, i have not re-booted again yet.
I recently redid my computer with in the last month so it has everything fresh installed and ALL updates from windows update.