To give full story; I've purchased a new laptop and have decided to sell my home built PC. When i came to cleaning the PC of all my files etc, i was running into some difficulties. I tried to reinstall Windows 10 and remove all files but i kept running into errors, the PC would say "there was a problem reinstalling Windows 10" and would fail. After this i entered through the boot menu just after powering on, i then selected the option to Repair during restarting. This has now trapped me in a situation where, my computer starts, says it's diagnosing, attempting to repair and ultimately fails, when i try to go through and select the option to continue to Windows 10, it just restarts the process.
Some pre-existing problems i've had which may be contributing, my OS is loaded onto my SSD and i have 3 other additional HDDs, i could never get the PC to boot from SSD so have to enter boot menu and manually select SSD everytime i used to power on.
I hope someone can help me as im at a loss.