Windows 7 - BSOD Error Code 116 when playing any games. nvlddmkm.sys

Hello. I recently bought an Asus Essentio (the i5 core one) and I have had it for about 3 months. Whenever I play any games whether it be Garrys mod, Counter Strike, Team Fortress 2 , or even WoW, I get a blue screen with error code 116, and file nvlddmkm.sys. I have downloaded driversweeper, uninstalled my driver, started in safe mode with no internet connection, ran driver sweeper, and analyzed and cleaned all nvidia components. I then reinstall my driver from desktop in windows. This may work for about a week, and then it starts happening again. Any other solutions to this?
PS: I put a GeForce GT 520 2GB in my pc, have a 350w psu and 12 GB of ram. I have also checked to make sure the card is installed properly.

Start with the steps outlined in the first three posts by usasma of STOP 0x116: VIDEO_TDR_ERROR troubleshooting.

Please follow the Blue Screen of Death (BSOD) Posting Instructions if you need further help.