Windows7 Ultimate prohibits the use of U disk skills

Win7 Ultimate disables the U disk:
1, click Start, run, enter the group policy command gpedit.msc, open the Group Policy Editor, find the local Group Policy Editor, select the computer configuration --- Administrative Template -- -System---Device installation---Device installation limit item, you can set it on the right side: It is forbidden to install mobile device, as shown in the figure:

2, double-click the above to prohibit the installation of removable device, and then If you select Enabled in the configuration, you can disable the U disk in win7.