Okay.. Problematic software
Start Menu\Programs\AVG Public:Start Menu\Programs\AVG Public
Start Menu\Programs\Catalyst Control Center Public:Start Menu\Programs\Catalyst Control Center Public
Start Menu\Programs\RegAce System Suite Public:Start Menu\Programs\RegAce System Suite Public
Please uninstall AVG, it contributes in BSoDs. Use free Microsoft Security Essentials instead. It's light weight and does not create problems with the windows 7 OS. Refrain from using PC optimizer/Registry Cleaners like the one you have installed. These things wreck the system beyond repair. You also need to update your graphic card drivers to their latest. Avoid CCC as in Catalyst control center during installation of fresh drivers. Use Revo Uninstaller (Advance mode) to get rid of the registry cleaner.
For the ATI drivers, uninstall it from control panel first:
Click on the Start
► Control Panel ► Programs ► Uninstall a program ► Uninstall the ATI related stuff. If there are driver remnants use Driver Sweeper to get rid of them.
Then run the System File Checker that scans the integrity of all protected Windows 7 system files and replaces incorrect corrupted, changed/modified, or damaged versions with the correct versions if possible and run Disk Check again
Let us know the results and further BSoDs if any