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Tip & How To about Microsoft Windows XP Professional for PC

how to disable usb mass storage in windows xp

Posted by abdul vahid lakkalabdul vahid lakkal on Wednesday, March 17, 2010

To disable usb ports we have to do some registry settings and change the key to 4.


"Warning : Serious problems might occur if you modify the registry incorrectly by using Registry editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk. If a USB storage device is already installed on the computer"

Follow these steps:

1: Start the registry editor from start menu by typing regedit in Run dialog box.

2: Navigate to HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services/UsbStor

3: In the right pane, double-click Start.

4: In the Value data box, type 4(if 3 is there,change the value 3 to 4), click Hexadecimal (if it is not already selected), and then click OK.

6. Quit Registry Editor.

When you do so, the USB storage device does not work when the user connects the device to the computer.

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