C# Disable/Enable USB ports

Question

I want to disable/enable all usb ports at once.
I tried the following:

Changed the registry (with admin privileges):

//disable USB storage...
Micros         


        

Answer 1

make USBSTOR value to 4 and restart the PC. Another way is to disable in BIOS. Most of the computer manufacturers support this. But it will disable not only storage but all.

Answer 2

That registry key prevents the USBSTOR driver from loading. It won't unload it if it is already in use. So you will not see any effect until after reboot.