I dropped my computer (Dell Inspiron 15R) and the hard drive went bad.
Got a new hard drive installed with out an OS.
I had a Windows 7 32 bit disk and started to install it, but failed to realize it was an upgrade disk and there needed to be an existing OS for it to work.
Now I have an old Windows XP, SP2 OS disk and when I try to install that, I get the blue screen of death every time.
How can I delete the Windows 7 upgrade I put on there first, so I can install XP and then use my Windows 7 upgrade?

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