Can't reformat windows 7

I already have windows 7 x64 edition installed on this computer. I'm trying to do a full reformat and delete everything and start fresh. When the computer starts, I hit F12 and try to boot from the disc. All it does is just go straight to the login screen and I'm back where I was before...with the old operating system.

Tried switching the BIOS to boot from disc...nothing is working? It's just an endless loop I'm getting.

Restart->F12->Boot from CD-> just continues to login screen.

is there something different with windows 7? How to I reformat this thing?
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  1. Hi,

    Try with Different Windows 7 Installation CD, may you are using CD is Corrupt.....
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