Extreme lag and low FPS during any and every game

Hi there, ever since last night any game I try to open, whether it be an online one on steam or battlenet or an offline one experiences major lag during menu, loading and in game if im lucky to enter. Diablo III took 6 tries before i managed to enter the game where the lagging persisted. Rust and Killing floor major lags i couldnt even enter a game and servers wouldnt open. Fallout 3 on my computer would crash every time. Age of Empires II couldnt open past the windowed menu selection, Saints Row the Third stuck on loading screen. Oblivion wouldnt open due to first time set up DivX failing. Mirrors edge would experience Application load error p: 0000065432.

Im including a DxDiag, SFC Scan result which shows corrupt files unable to be fixed.

My graphics card is Nvdia GeForce 720M
Internal graphics card is Intel HD Graphics 4000

you should reinstall your Graphics drivers upgrade them to latest version
your windows seems to not detecting your Graphics card it said Microsoft Basic driver"
this driver does not support openGL most games wont work
try this and update your availabe drivers for HD 4000
Intel® Driver Update Utility
Drivers - Download NVIDIA Drivers
download for nvidia too input your windows edition or easily click in detect drivers and download and install it
hope this helps
regards