How does the win7 system set the hard disk to be inaccessible through the policy group?

We all know that important system files, programs, personal privacy, etc. are recorded in the hard disk of the Win7 system. If the user lends the computer to others, it is easy to be copied and viewed by others. So what should we do in this situation? In fact, we can set the hard disk to be inaccessible through the policy group, and fundamentally solve this problem. The following small series will explain the specific setting method for everyone!
1. Select the running dialog box on the system start menu, enter gpedit.msc command in the running window and click OK;

2, then in the group Under the policy, expand “User Configuration”, “-“Administrative Templates"-“Windows Components”-“Windows Explorer 

3, Double-click to open “ Prevent from my computer Go to Drive ”, select “Enabled">;

4, then select the drive you want to limit in one of the following combinations, and click the OK button. A prompt window will appear. “Local operations are cancelled due to the limitations of this computer. Please contact your system administrator”.