What if the win7 System Restore button turns gray and cannot be used?

What if the win7 System Restore button turns gray and cannot be used?

1, single hit open Win7 computer Start menu, and then into the control Panel;

2, in the interface of the Control Panel, click into the system security-system-management tool service, then we find Windows Backup service in the Open service window, and click to start the service;

3, if the above method can not solve the problem, at the same time press the Win7 flagship computer keyboard win+r shortcut keys to open the computer's running window, in the Open running window, enter the Gpedit.msc and click return;

4. In the Open Group Policy Editor window, click to expand the Computer Configuration in the left menu-Admin template-system-System Restore, find and double-click to open "Turn off System Restore";

5, in the pop-up window, the default configuration is changed to Disabled, and then click OK to save.