How do I unlock my computer?

I have this extreme weird problem were my computer locked me out right after I restarted from a Iobit disk and registry defragmentation. When I booted back up it automatically showed me the (The user name or password is incorrect). It's kinda like it thinks I don't have a password so it auto logs me in and then for some reason I don't log in. I'm guessing the problem has something to to with the registry because I don't think defragmentation would cause this. Also I tried the Offline NT password reset program that you need to mount on a disk image and then run the pc with that in but even though the software said that it removed my password it still says I can't log in. I would really appreciate help because I spent a lot of money for a person my age on an expensive pc.

I think Iobit makes Advanced System Care? I'd generally avoid those type of apps.

Have you attempted a System Restore to a time prior to whenever this began? You may have to boot into safe mode.

Yes Iobit makes advanced system care and I tried to restore to a earlier point in history but for some reason there were no backups available and safe mode also seems to be no help.

I do have Ubuntu installed so if there is a way to access my files or fix something from there that would be a big help.