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Before installing Windows 7 did you run the upgrade adviser?
Windows 7 Upgrade Advisor - Download - Microsoft Windows
Start Menu\Programs\AVG Public:Start Menu\Programs\AVG Public
fffff880`084139d8 fffff880`040f6c78Unable to load image \SystemRoot\system32\DRIVERS\avgidsdrivera.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for avgidsdrivera.sys
*** ERROR: Module load completed but symbols could not be loaded for avgidsdrivera.sys
AVG antivirus is contributing in these BSOD-s and is often a cause of BSOD-s itself. Suggest you to uninstall it and use Microsoft Security Essentials at least to test.
AVG | Download tools and utilities
Microsoft Security Essentials - Microsoft Windows
Start Menu\Programs\Spybot - Search & Destroy Public:Start Menu\Programs\Spybot - Search & Destroy Public
Spybot S&D is not the best protection software. It can slow down & corrupt the system.
You may keep the free version of Malware bytes
which is a great combination with MSE.
How to uninstall | Spybot ©
Removing Spybot - Safer-Networking Forums
Look for an update on the BIOS version.
BIOS Version/Date Award Software International, Inc. F10, 31.8.2009
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:
SFC /SCANNOW Command - System File Checker
Run Disk Check on your hard disk for file system errors and bad sectors on it:
Let us know how it went. Good luck