I receive this error when trying to manually update: The license key for this product is invalid or expired.
License is valid until: Wednesday, December 31, 1969
Current date: Wednesday, September 12, 2007
I've had no problems until a few days ago. When I look at About avast!... it says Expiration: Thursday, January 12, 2012 1:59:55 PM and Updates expiration: never.