I have an old hard-drive with Windows 7 and Ubuntu 12.04 LTS installed which I used to dual boot from. I replaced this hard-drive recently and have only been using Ubuntu but I find myself needing to use Windows again on the old HDD. After physically re-connecting the old-drive to my motherboard, and then trying to start Windows 7 from the boot menu I get a blue-screen of death.
I tried starting Windows in recovery mode and doing a system restore but this did not resolve my issue.
Ideally, I would like to be able to remove Ubuntu from my old drive, and let each OS reside on its own HDD.