Quote Originally Posted by Edwin View Post
Most likely triggered by updates or installations.
To turn it off completely you would need to disable System Restore in Group Policy:
Local Computer Policy►Computer Configuration►Administrative Templates►System►System Restore►'Turn off Configuration' or 'Turn off System Restore'; highlight each for more info and read the policy settings carefully.
this tip requires launching the gpedit.msc file and the Group Policy configuration file is only included in Pro editions of Win8 & Win8.1 and not included in the "Core" or Home editions of Win8.x.

So for those using Core or Home editions of Win8/8.1, open Registry Editor (regedit.exe) with Administrative privileges and go to the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\SystemRestore
If the SystemRestore key does not exist, create it. Inside the SystemRestore key, create an entry called DisableSR of DWORD type and set its value to 1.