MBP screen keeps freezing and these pixelated lines appear...

Hi,
For the most part, I've been a happy MAC user but I have been experiencing some problems. For example, if I moved the mouse to close a program or something similar, the screen would freeze and these pixelated lines of black and white would appear, sometimes flashing. These lines would either cover a third or all of the screen. When I restarted, the lines would appear in blue right after the apple icon appears. This has been happening infrequently for the past day or so.
From browsing the internet, I've come across the GeForce 8600M GT GPU issue. I've checked and I do have this component. From Apple's article, my problem is not so much with the video, although it is really slow and intermittent at best but with the display screen (I think that's the proper term). I ran a general hardware test and all seems to be okay.
Would my problem(s) fall under this recall? Would I be eligible to get a (free) replacement? Further, is there a hardware test I could specifically run to test this? This is driving me crazy! What do you think?
Many thanks!

I reinstalled and everything seems to be working fine.

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MBP screen keeps freezing and these pixelated lines appear...

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