Disable/ Enable USB and CD drives in windows XP/7 using registry key

Use the registry key to disable and enable USB drives and CD drives in windows XP/7

To Disable

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\UsbStor]

"Start"=dword:00000004

[HKLM\System\CurrentControlSet\Services\cdrom]

"Start"=dword:00000004

To Enable

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\UsbStor]

"Start"=dword:00000003

[HKLM\System\CurrentControlSet\Services\cdrom]

"Start"=dword:00000001