There is a lot of information online regarding System Restore being disabled in Windows 10. There are those who say that it was disabled by default by Microsoft in a attempt to reduce the size of the operating system. There are those who have had problems with System Restore being disabled after the anniversary update, and then there are those who have had problems with System Restore after upgrading from either Window 7 or 8.1. I did a system restore after the anniversary update which was successful, but I've seen enough post where it has been disabled to believe that this is actually happening.
If you want to check to see if System Restore is enable open the Control panel and select System.
When System opens select System protection. Under Protection settings you should see On for Local disk
If it is not, select Configure and click/tap on Turn on system protection.
Edited by dc3, 15 March 2017 - 01:01 PM.