I may have done a bad thing. I've done installs in the past, so I just hopped into this without researching and now I am to the point of asking for help.
I have a 2TB harddrive that had Windows 8 on it. I wanted to install Windows 7, so I pop in the DVD but I'm not able to partition the HD, nor can I boot from the DVD. So I proceed with the install, figuring I'd be able to fix it after the fact. So I have a working copy of Windows 7 on my HD, but a non-working copy of Windows 8 on the system partition (I'm assuming that's related to the UEFI-thing I've been reading up on).
Am I at the point where a complete reformat of the drive would be the proper thing to do, or can I still salvage this headache of a reinstall?