Recently I have been having my MBP 2011 freezing usually when I'm watching videos through VLC. The strange thing is that I can still move the mouse cursor. My MBP specs are as below: 15" Hi-res Antiglare 2.0Ghz i7 8GB (third party kingston RAMs) 128GB Intel 320 SSD 6490m Mountain Lion I have tried the following: Fresh install a new OS (Moved from Lion to Mountain Lion) Ran Apple Hardware Test, test passed with no errors Downgrading VLC to 1 version before All of the above failed. I do have AppleCare but as I use third party RAMs and SSD, I will like to know if the problem could possibly be caused by them? Any ideas on what could cause such a problem?