If you want, you can switch usb port off permanently. Because Using
usb port is an easy way to be attacked by virus. If anybody insert
memory card or pen drive into your computer, they can not see it. How
funny. First of all, right click on my computer icon on your desktop.
Then, click on Manage option. then press on continue button. Then device manager> Universal Serial Bus controllers> USB Root Hub. Right click on USB Root Hub and make it disable.