I found my screen goes black suddenly with lagged sound when i am watching video. It is the same when i am playing on both PowerDVD 10 Mark II Version 10.0.2429.51 and Windows Media Player 11. Below are the specifications: 1. AMD Phenom II X2 560BE at stock speed. 2. 2 x Kingston Value Series DDR3-1333 2GB ram (Ganged) 3. Gigabyte 870A-UD3 motherboard (Bios version: F5a) 4. Gigabyte Radeon HD5750 GDDR5 1GB graphic card 5. WD-5000AADS Caviar Green 500 GB hard drive 6. Creative SB Audigy Value 7. Coolermaster Extreme Power 460W psu 8. Coolermaster Hyper 212+ cooler 9. Windows 7 Ultimate x64 SP1 10. ATI Catalyst 11.2 Is my computer dying?