x64 Home Premium - freezing & glitching

Specs:

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Manufacturer Info: ASUSTeK Computer Inc.
Model: ASUS CG5270
OS: Vista x64 64bit Home Premium w/ Service Pack 1
Processor: Intel Core 2 Quad CPU 8300 @ 2.50 GHz
Video Card: NVIDEA GeForce GT220
RAM: 8GB
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My computer screen starts to glitch and almost always freezes now upon playing a game or viewing a photo. I have no idea what the problem is. Driver is updated to the latest version. I am running anti-virus with no sign of any viruses, malware, spyware, etc.

Please help me. I don't know what to do. I just want this to go back to normal. I'm sick of seeing pixelated glitches, screen glitches, blue, shutdowns, and windows error messages.

Thank You.

Hello JehC,
How are the temps, both CPU and GPU ?.
Download these apps and keep an eye on them when the problem starts.

Download SpeedFan - Access temperature sensor in your computer

techPowerUp! :: Downloads

Have you had a BSOD, (blue screen of death).
Give these apps a go and post the results. Good luck.

Hai JehC

i am having Hp 2701tx model the same vista home premium installed in it , the exact problem occured in it ... please help me ...now ur laptop working perfectly???

Yes I got one blue screen of death the other times the screen, system, applications, and cursor froze. The only way to do anything would be to manually turn off my computer.