How to disable writing to USB?

Share If you are the administrator of public cafe or school,this trick will be helpful for giving protection to your system.
 You can disable writing to USB.  This will prevent from file stealing.  You have to login to administrator so that you can
access regedit.

Go to start .  Select run.

Type as regedit and hit enter
Now navigate to

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\StorageDevicePolicies In right panel you can find writeprotect
Change the value to 00000001

or

to  ‘HKLM\SYSTEM\CurrentControlSet\Control\StorageDevicePolicies‘ and   create a new DWORD value ‘WriteProtect‘ and
set its value to 1.
 This will enable you to read from USB drives, but you won’t be able to copy data to it