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Some of your BSOD-s were caused by you antivirus itself. Please uninstall it and replace with Microsoft security essentials.
Start Menu\Programs\AVG Public:Start Menu\Programs\AVG Public
Probably caused by : avgldx64.sys ( avgldx64+649b )
Probably caused by : avgidsfiltera.sys ( avgidsfiltera+1b88 )
Recommended antivirus program for Windows 7 based on stability compared to others:-
Do not start the free trial of Malware Bytes; remember to deselect that option when prompted.
Run a full scan with both (separately) once downloaded, installed and updated.
Run the System File Checker that scans the of all protected Windows 7
system files and replaces incorrect corrupted, changed/modified, or damaged versions with the correct versions if possible:
Free up the start-up, nothing except the antivirus is usually needed.
Run Disk Check on your hard disk for file system errors and bad sectors on it:
Check for a newer BIOS version:
BIOS Version/Date American Megatrends Inc. 0209, 7/28/2009
Let us know how it went.