Change folder settings to view hidden files + protected operating system files.
System Volume Info becomes apparent in the C drive. You need to right click it, go to the security tab, click advanced and continue. Then add yourself to the list (add principal or change owner whichever it gives you based on your OS) (just type in the user name you use at login, leave permissions alone)
You'll find system restore in there. You need to gain access the same way, by doing the above again for each folder you encounter. You'll probably get an error like "could not apply the settings to bla bla bla" (3 times). Ignore that.
Back up your restore points, they have cryptic names or some such. Yeah, system restore is pretty useful, but hate how it deletes older restore points after some time passes. I almost got deactivated with some stupid update (yes I'm genuine) but you know MS...