@Bliss - ofcourse I tried with reinstalling the CLOD and Steam completely but nothing changed...deleted both versions from my HDD and installation target wasnt /program files.
But I will try to tweak some other stuff, so we will see.
My rig is: i7920@OC 3.5Ghz (HT OFF), GTX 470 Twin frozr2 (OC 800mhz on core, which will be a bit better than stock 480), 6GB of RAM working on app. 1333Mhz, WD C.Black,32MBc., X-FI ex. gamer, Dell 2209wa (IPS, 1680x1050, low input lag), Win 7 Ultimate 64. For defrag Im using Mydefrag and for tweaking wins - Yamicsoft Win7 manager.