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Windows 7 Stuck in diagnostic loop
I have windows 7 home premium 64bit. My dell laptop is currently stuck at the diagnostic startup whenever I load up the computer. I have ran both memory test and memory system, and both indicated no error. I have tried going into safe mode using F8 but that didn't work. I tried reinstalling the system using my Windows 7 CD but apparently I can't boot from the CD either. The CD doesn't automatically read nor does it work from the F12 boot up. I can't access the command prompt either. No matter what I do, it keep returning to the diagnostic screen.
Please help!