1, first right mouse click win7 64-bit pure version of the System desktop computer icon select the "Properties" option;
2, in the pop-up "System Properties" interface, switch to the "System Protection" tab, check the C disk restore protection is turned on, and click the "Configuration" button;
3, in the pop-up "System Protection Local Disk" window, change "Restore Settings" to "Turn off system Protection", and then click the Delete button;
4, this time will pop up "user to revoke this drive previous version of the File" dialog box, select "Continue";
5, the system will prompt "has successfully deleted these restore points", click the "Close" button;
6, then the system to protect the Local Disk window click on the bottom of the "Application" button, pop-up a dialog box to select "Yes", and finally click "OK" on it, so you can turn off the system partition restore function.