How can I prevent users from connecting to a USB storage device?

http://support.microsoft.com/default.aspx?scid=kb;en-us;823732

If a USB storage device is already installed on the computer, set the Start value in the following registry key to 4:

HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesUsbStor

When you do this, the USB storage device does not work when the user connects the device to the computer. To set the Start value, follow these steps:

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_MACHINESYSTEMCurrentControlSetServicesUsbStor

4. In the details 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. Exit Registry Editor.

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转载于:http://blog.itpub.net/167898/viewspace-1046680/