Operating System: Windows 7 Ultimate 32-bit Processor: AMD Athlon 64 X2 Dual Core Processor 3800+, ~2.0 GHz Memory: 2048MB (2GB) RAM Page file: 2203MB used, 1633MB available GFX Card: Integrated NVIDIA GeForce 6150SE nForce 430[/p] This problem started about three months ago. Whenever I run certain tasks, like play a Youtube video or open Microsoft Word. My computer starts to rumble. It will continue to rumble until I finish what I'm doing. If I continue with the task, the computer would then abruptly shut off. This hasn't ever happened before. I'm puzzled as to why this is happening. Help?