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August 28, 2008 / technocrawl

Enabling & disabling the USB port in windows via registry.

As per the Microsoft knowledge base article 823732 which

contains instructions on how to disable USB storage access

for a certain group of users this disabling and re-enabing

of USB ports is based on a simple registry entry.

To disable the access to USB port, in windows XP and 2000:

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 4, click Hexadecimal

(if it is not already selected), and then click OK.

6. Quit Registry Editor.

To re-enable a disabled 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, click Hexadecimal

(if it is not already selected), and then click OK.

6. Quit Registry Editor.

However, there can be other ways too to bypass this issue,

one of the easiest is to invest in a PS2 to USB port convertor.

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2 Comments

Leave a Comment
  1. chamin / Oct 29 2008 9:29 am

    i have done this in my office. at that day i could have access the USB port. but again next day when i tried it. it has been blocked again. these methods doesn’t enable the USB port now. there could some other tasks additional to this as i think. Please Help

  2. Makarand Bhale / Apr 10 2012 4:27 am

    there may be several causes to this,

    1) Domain Policy is configured to disable USB
    2) local security policy

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