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Easy way to Enable USB port 1. Goto run 2. Type 'regedit' without quotes 3. Click on HKEY_LOCAL_MACHINE 4. goto SYSTEM 5. Click on CurrentControlSet 6. Click on services 7. Goto USBSTOR 8. Double click on 'Start' where value is 4 9. Now change the value data with 3 10. Now press ok and refresh your desktop your USB port is Enabled, to Disable the usb port replace the value 4 with 3.