The solution is as follows:

1. First, right-click the computer icon on the desktop of win7 system and select the "Device Manager" option.

2. Then right-click the USB device with exclamation point to update the driver. Do not choose automatic search, choose to set the installation location.

3. In the file selection, change the address to windowswinsxs, and then click Next.

4. At this time, you are waiting for the interface. There will be an early warning prompt after a while, that is, an unsigned file is installed and so on. Leave it alone and choose to continue the installation.