Tip & How-To about Microsoft Windows XP Professional

How to disable USB ports

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.

5. 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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    For more information about how to back up and restore the registry, follow the steps as in the KB Article: http://support.microsoft.com/kb/322756/
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    Serious problems might occur if you modify the Windows registry incorrectly. **PLEASE** make sure that you follow these steps *exactly* and *carefully*. For added protection, back up the registry before you modify it in case you have trouble so it can be restored.
    For more information about how to back up and restore the registry, follow the steps as in the KB Article: http://support.microsoft.com/kb/322756/
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To disable the write protection:
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    2.Navigate to HKEY_LOCAL_MACHINE > SYSTEM > CurrentControlSet > Control > StorageDevicePolicies.
    3.Double click on "WriteProtect" and change the value to 0 (WriteProtect = 0 for disabled; 1 for enabled).
    4.Close the registry editor and restart Windows.
    5.After Windows starts, test writing to your USB drive.
    Important Note:
    Serious problems might occur if you modify the Windows registry incorrectly. **PLEASE** make sure that you follow these steps *exactly* and *carefully*. For added protection, back up the registry before you modify it in case you have trouble so it can be restored.
    For more information about how to back up and restore the registry, follow the steps as in the KB Article: http://support.microsoft.com/kb/322756/
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To disable the write protection:
    1.From the Start menu, click "Run", type "regedit", and press <Enter> or click <OK>.
    2.Navigate to HKEY_LOCAL_MACHINE > SYSTEM > CurrentControlSet > Control > StorageDevicePolicies.
    3.Double click on "WriteProtect" and change the value to 0 (WriteProtect = 0 for disabled; 1 for enabled).
    4.Close the registry editor and restart Windows.
    5.After Windows starts, test writing to your USB drive.
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    Serious problems might occur if you modify the Windows registry incorrectly. **PLEASE** make sure that you follow these steps *exactly* and *carefully*. For added protection, back up the registry before you modify it in case you have trouble so it can be restored.
    For more information about how to back up and restore the registry, follow the steps as in the KB Article: http://support.microsoft.com/kb/322756/
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