Are you saying it never boots up?
Since you don't know what that program did, it might be easier and less time consuming to do a reinstall.
Can you boot into safe mode? https://www.businessinsider.com/windows-10-safe-mode
If so, you can offload all your "stuff" (assuming you don't have a recent backup and need to).
Then reload W10 from a USB drive. Unfortunately, you will also need to reload any programs you use.
Then you can copy back your stuff.
DO NOT use those speed up programs, drive or registry cleaners, etc.
Download drivers from the mfg or let Windows take care of it.