here's my situation: I had an HDD with Windows 8 installed (UEFI mode). I bought a SSD and wanted to do a clean install of Windows, so I thought that disabling the HDD and leaving the SSD as the only drive when installing was the right procedure to install the boot manager on the SSD.
Unfortunately, after I plugged the HDD back in, the computer won't boot unless I select from the BIOS directly the SSD as the boot device. I guess the problem is that I have two Windows Boot Managers on two separate drives and they conflict. How would I solve this problem (excluding a format of the HDD, because I need to access data on the old Windows partition and, ideally, I would like to be able to boot that partition)?