In the avastUI, Real-Time Shields, File System Shield, at the bottom of the window, Shield log. There may not be anything reported there if you have rebooted since the alerts. Check the C:\Documents and Settings\All Users\Application Data\Alwil Software\Avast5\report\FileSystemShield.txt file using notepad if there is nothing in the other avastUI display. But based on your posts, I don't believe avast is actually alerting, so you are unlikely to find anything in either.
What would help (possibly) is a screenshot of the actual warning by the software.
However, I still wouldn't disable avast just to be able to play a game and leave yourself wide open to malware.