swapped hdd, formatted old, now Windows is acting weird

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http://superuser.com – I swapped HDDs via system image, and I'd been running ok with the old HDD unplugged. Win7 and Win8 installed, Win7 my main os forever, Win 8 installed on my new HDD after the swap. Today I decided to get my old HDD back on and formatted. First I plugged the old HDD in and tried booting back up. It wouldn't boot at first, so I ran system repair, which didn't work at first either, until I swapped SATA cables and ran it again. Then Win7 booted and looked normal, although I didn't test it thoroughly my desktop was as I had left it. Although my boot options were Win7, Win8 (recovered), Win7 (recov (HowTos)