After installing Avast 4.7.942 I can no longer shutdown Vista. It gets to the point of saying “Shutting Down” but never actually completes.
I’ve tested this on two machines with the same result.
If you close avast (the last option in the ‘a’ blue icon > Stop On-access protection), will the computer shutdown correctly?
Do you use a firewall? Which one?
Do you have any other antivirus installed in your system?
Any other security programs that could interfere?
Is there any hardware that is not being detected (and driver installed) by Vista?
Is there any Windows Events (errors) that could guide us troubleshooting?