I have purchased HP desktop at my home for my personal use one year ago. I don’t have any problem with working of the device till last week. But after that I faced some serious problem with my device. The actual problem is the dark screen comes up when I tried upgrading to Windows 7 from Vista. When I try to enter 1,2 … then also this problem comes on the device. I cannot understand anything. Can anyone there who can give me some suggestion to solve this problem. Please help me.
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