Windows has had 'restore points' for the registry since forever which are auto-created every time an application is installed. Prior to that the system came with backup/restore tools. They're even mentioned on the Wikipedia page.

And I've seen too many non-functional W10 systems with a corrupt registry. AFAIK, Windows used to make automatic backups of the registry that you could restore from, but they stopped doing that several years ago. I don't care what Wikipedia says. It's a shitshow and a brittle system with an absurd single point of failure.

I don't think I've seen or ever heard of a "corrupt registry" in my life. Are we talking about hard disk corruption or logical errors in the registry?

I've seen it once during a few years as a campus tech support for about 10,000 people.

There was a Windows machine that was struggling to complete boot or otherwise just wouldn't get to a functional state. Windows itself knew something was wrong but was unable to fix it.

I ran a live cd, removed the "live" registry file, and let the system automatically revert to the backup version of the registry it had right there. Problem solved, perfect system up and running.

Logical errors in the registry AFAIK. Maybe it's a broken hive file that wasn't cleanly written and closed. Who knows. It's not like Windows is particularly transparent about registry issues.

You can read the Event Viewer.

If the system isn't bootable?

You put the disk in another windows machine and use event viewer from there

I think OP has a machine misbehaving and is thinking "probably a registry problem" in the same way you'd say "probably something wrong in /etc" on Linux.