computer lags with no reason

Andrius94

Honorable
Oct 25, 2013
2
0
10,510
At first I wanna say that English is not my native language, so sorry for it. After i got upgraded my internet from 4mb to 100mb pc started to lag(on win7 x86 platform). It uses big amount of ram ( ~50%+) when im doing nothing. So i tried to install x64 platform, but it gave me nothing (i formated my system disk(C)). Later I tried tuneup utilities to defragment my hdd and optimize everything - nothing, eset smart security for viruses - nothing, malwarebytes - helped a bit(google chrome tabs were opening fine, with no lags), but big amount of ram was still used for i dont know what. Now i dont know what to do.
PC: amd athlon ii x3 435, 4gb ddr3 ram, xfx 5750, hitachi 160GB 7200 RPM 8MB Cache SATA 3.0Gb/s , 400w codegen psu, ASRock N68C-S UCC mb.
First time writing such a thread , so if i forgot something - i can add it
 


but it shouldnt be like this http://i.imgur.com/U6Cwfn2.png . before this problem, ram usage was ~30% when doing nothing. And now when i play something and minimize the game i see that ram usage is ~95%, when game uses 1gb of ram. earlier, when minimized, task manager and windows gagdet showed around 50%