I'm not sure why this started but just recently my computer has locked up a few times. a light gray bar has come across the top 1/5 of the screen. It is quite interesting seeing as how I haven't really been doing anything when it came up. just surfing the web.

Please let me know if you have any idea whats going on. My specs are listed in my sig

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.:AMD Machine:.
2.6GHz Quad Phenom 9850.:.Biostar TA790GX.:.8GB DDR2 1066MHz.:.nVidia 8600GT.:.500GB Sata HD.:.Running: LawlessPPc 10.5.4 Update to 10.5.7.:.Voodoo Kernel REV A:.

.:Macbook Pro:.
Intel Core 2 Duo.:.2GB DDR2.:.200GB HD:.