How to Enable or Disable USB Ports and CD ROM

How to Enable or Disable USB Ports and CD ROM
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To Enable or Disable USB port:

  1. Click Start, and then click Run.
  2. In the Open box, type regedit, and then click OK.
  3. Locate, and then click the following registry key:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\UsbStor
  4. In the right pane, double-click Start.
  5. In the Value data box, type 3 to Enable and 4 to disable,
  6. test USB port insert pen drive, it not show in computer

To Enable or Disable CD/DVD ROM

  1. Click Start, and then click Run.
  2. In the Open box, type regedit, and then click OK.
  3. Locate, and then click the following registry key:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\cdrom
  4. In the right pane, double-click Start.
  5. In the Value data box, type 1 to Enable and 4 to disable, click Hexadecimal (if it is not already selected), and then click OK.
  6. Quit Registry Editor.
  7. Restart Computer

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