Any virus programs blocking any files?
Make an exclude on this folder.
C:\Users\YOUR PROFILE\AppData\Local\Temp
Try setting all the .exe files in the Game Guru root folder to run as admin.
See if that helps.
Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz, 2400 Mhz, 4 Core(s), 4 Logical Processor(s), 8gb RAM, Nvidia gtx660, Windows 7 Pro 64bit, Screen resolution 1680 x 1050.