hi everyone my windows desktop doesnt star after i tried to install windows 7 in it without fromatting windows xp which was der before, now the problem is that cpu starts and fans are spinning but the monitor goes blank after showing boot options[e.g press f2] so please help me start again with my desktop....

If this happened to me, I'd redo the installation by booting to the Win7 media and perform a clean installation.

Before I do that I would ensure that my data on the drive was backed up. If you have data, you could easily connect this drive to another PC via an IDE-USB connection and copy the data off.

From my years of experience, while you could technically fix your issue, I don't see the point. Windows is bad enough on a simple install, trying to fix this could leave your PC with issues.

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