Hi Leon,
Disconnect the cloned drive and leave the original, never leave the cloned drive connected after cloning.
Then, boot to your original Windows installation DVD disk and choose the repair option, that will repair any boot sectors for you the easy way. See
https://appuals.com/how-to-perform-s...s-88-1-and-10/
Ignore the ad's on that page.
and choose
Method 2: Perform a Startup Repair using installation media
Seeing as your original disk was working fine, that is all you should need to do. If your computer does not boot from the disk after setting the boot order in the BIOS, then there is usually a button you can press when the computer starts up that takes you directly to the boot order menu instead of having to go into the BIOS.
Cheers,
Damien.