PC freezes suddenly :S

[Nikos_34]

I'm reposting

My PC specs:
CPU: AMD Phenom II x2 550 @3.2 Ghz (default)
Motherboard: ASUS M4N75TD
Memory: 2x2 Gig
Hard drive: 320GB (100 GB free)
Graphic card: GTS 250 1Gb
Power supply: OCZ 500W
OS: Win 7 Ultimate build 6701 with service pack 1

Prob:my PC freezes while I'm playinging CS 1.6 or simply when I'm on my desktop (idle).
I restart my PC so it work.

What I've already done:
-Temp monitoring (no excessive heating 35°c at maximum load for my CPU.)
-Memory testing( I was surprised to find that I have some errors so I changed my memory sticks hoping to fix the problem, Itested the new sticks they worked like a sharm. but I get a punch in the face 2 days later when the problem persists.
-Launched Malwarebyte (which removed 8 add-ware) but the problem is there
I'm willing to follow your instructions as they are
Thanks in advance

 

[puntojay]

i no you might of already done this but you done a scan for a virus.

 

[Nikos_34]

Yep I run a scan and there Weren't any viruses
But anyway I suspect:
-My Nvidia drivers (I'm currently running on my old drivers just to test if there's any changes)
-My Windows 7 Service pack 1. I think the problems started since I've installed it (so if it isn't the drivers I'm gonna Install a newer build of Win7)
-A hardware Failure if non of the above works I'm going to the technician and leave the rest for him

 

[puntojay]

nothink like abit of hard work is there. yeah i would try what your doing with it. then if not chop shop. i had a couple of problems with mine freezing all time. wiped it and re installed windows and drivers worked a dream since.