Hi everyone, I'm having problem with my macbook pro. Please refer to the screenshot below. What you see is what I've been getting on my screen recently. This happened at least once a day now after the laptop is on for a while. The weird colors and pattern would just show up for no reason, and the whole desktop would freeze up on me. So I had to hold down the power button to turn off, then waited for a while before restarting the computer. I brought it to Genius, but they got no answer for me (plus warranty expired). Have you seen this problem before? Any suggestion? Thank you.