Update your wifi drivers, as it's 3+ years old and was tagged as the possible cause for this crash. If that doesn't work, update your AVG as well as any firewall software you may have, as AV and firewall software filter drivers can cause problems if they have bugs in em. You may need to uninstall AVG and replace it with another AV (like MSE) just to see if it's a problem specific to AVG.
Also update your motherboard's BIOS and any drivers that comes with it. Since this is a problem with power I/O for your wifi, motherboard problems can cause issues with it. Updating drivers for your mobo as well as the BIOS can resolve this if there's relevant bugs.
If none of that does the trick, I'd like you to turn on
Driver Verifier and get it to crash the system some, then turn it off and send us the crashdumps. Read all the instructions carefully.
