Here is how to rollback Windows 10 to the state it was is before using a previously created restore point.
This may be very helpful in case if want to undo certain system changes that are causing issues. For instance, you can roll back your Windows 10 to the previous state after installing a faulty driver or update that makes OS work unstable.
But note, that you need to do two things before you will be able to roll your system back: enable the system protection (yes, it is disabled by default which is weird) and create a restore point in advance, when your system works fine.