
Hey Chao,
OK that's good. As far as the virus scan, although this doesn't sound like any kind of virus or malware that I've ever encountered, what are you using to scan?
Also, does this, or anything like this, occur with anything else other than gaming? For example have you tested it out with video clips or the like, anything memory intensive? Have you done a memory test to make sure that there are no problems with your
RAM? If not I would recommend running a
Memtest scan.
RAM can go bad on you without warning, and cause glitchy problems.
Another possibility is that you have a bad graphics card. It happens, as you are still under warrantee, trading this one out shouldn't be that difficult.
Looking forward to your reply,
TTFN
LGW