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#41
Check in BIOS setup. Is Legacy BIOS enabled? If so then you're not running UEFI.
To decide if you want to reinstall look at the steps here to get a perfect Clean Reinstall - Factory OEM Windows 7 to compare how close you came. Did you handle drivers as given in tutorial? If not I'd reinstall.
Easiest is to Bypass UEFI to Install WIn7. Unplug any other HD's and peripherals first, as it says in the steps there.