I have a desktop PC with 128GB SSD drive, 4TB HDD and 256GB SSD drive.
Up until a few weeks ago, I had Windows 7 Home 64-bit installed on the 128GB drive. Then, I upgraded it to Win 10. Yesterday, I re-installed Windows 7 on the other SSD (the 256GB one).
Now, when I reboot the PC, it asks me to choose an OS to start the computer with. If it was giving me the option to choose between Windows 7 and Windows 10, that would have been very logical and even great for me, but the two options are the same ("Windows 7") and both lead to the same installed OS (Win 7 on the second SSD).
This means that now I cannot seem to get my PC to run with the Windows 10 installed on the first SSD (problem #1)
Even if I disregard this issue and want to continue just with the new Win 7, I don't need these options during booting and want it to start off immediately on the Windows 7 installed (problem #2).
BTW, If I disable the second SSD drive in the BIOS, I get an error message when booting saying there is no OS to run the computer on...
BTW #2, Even when I change the order of the booting device in the BIOS (and both drives are enabled, of course), it still loads the same two options as mentioned here, and still both of them lead to the same Win 7...