How to disable USB in Win7?

USB is almost a computer peripheral device, and its application is quite convenient. However, because of its convenient use, there are often information security concerns. Therefore, if it is necessary to control the USB port of the computer, how to disable USB? Let's take a look at the following small series.
The following disables usb operation in Windows 7 system:
Disable usb by modifying the registry.
1. Click [Start] > Enter regedit in [Search Programs and Files] and press the Enter key on your keyboard.

2. Then log in to the editor window, click [Edit] > [Find], and enter HKEY_LOCAL_MACHINESYSTEMCurrent in the search box to find the ControlSetServicesUSBSTOR string.

3. Find [start] and double-click to open the edit window. The default value is the enable value of 3. If it is changed to 4, it is disabled.