If you have system protection turned on, then you should still be able to do a system restore. System restores are also helpful to quickly undo an update since a restore point is created by default when Windows Updates are installed.
Refresh your PC—Attempts to solve system problems by replacing system files without affecting user data files. Still, such files still should be backed up before refreshing. Installed programs will have to be reinstalled except those from the Windows Store. A list of uninstalled programs is provided on desktop. You personalization settings will be maintained. System settings will be set to defaults. A Windows.old folder will be created at C:. You can delete it once you have everything you want from it. Use Window.old Folder - Delete in Windows 8.