Had this problem really since I got my laptop back in March time. The system randomly freezes and locks up, with no warnings or anything. Generally I will be watching a video or just browsing, but it happens when I game as well. I had the motherboard and ram replaced a while back, which seemed to alleviate the problem but it seems to have come back more recently. When it freezes the audio also gets stuck/stutters. Part of me feels the problem is the graphics card but i'm now sure. Any help welcome. Specs
XPS l502x
i7
6gb RAN
gt525m 1gb graphics card
Thanks
Jack