Weird MBP Issue

Hey all,

So I'm running the 2.4 GHz 15" MBP from April 2010. I originally had 4 GB of RAM, but upgraded to 8 GB (from Newegg). I'm running OS X Lion 10.7.4.

I've recently started having an issue with my computer. When I swipe my trackpad to go to Mission Control I have the screen shut off and the computer freezes. The keyboard remains lit. If I'm playing music the song starts skipping. I have to hold the power button to turn the computer off and then hit it again to start back up. Normally I've found this problem to occur when I have multiple Safari browsers open, iTunes, and one or two other applications.

I took the computer to the Genius Bar and their diagnostic system found no hardware issues or software issues for that matter. They told me I could reinstall Lion (which I did) but it did not seem to really help.

Any ideas on what may be going on and how I might be able to fix it?

Thanks!

-splatkid10

 

What are corners? I do have some trackpad multitouch features changed up a little bit. I get the feeling that it is not a track pad issue, but a memory one. If I save and upload a copy of the error report next time it happens will that help?

-splatkid10

 

Anyone have an idea?