Hello, I have had a Dell XPS Desktop for the last 11 months running Windows 7 Ultimate 64 Bit Operating Software. About 5 days ago, my computer started freezing after being up for between 30 to 60 minutes. I have run the Pre Boot System Analyzer suggested by Dell, and all of the hardware components passed the different tests. I have run defrag, disk cleaner, malware, and full scan antivirus...
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