Microsoft KB Archive/937650

= The Disable button on the Driver tab of the parent USB host controller is not available in Device Manager after you connect a USB keyboard to a Windows Vista-based computer =

Article ID: 937650

Article Last Modified on 5/29/2007

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APPLIES TO


 * Windows Vista Ultimate
 * Windows Vista Enterprise
 * Windows Vista Business
 * Windows Vista Home Premium
 * Windows Vista Home Basic
 * Windows Vista Ultimate 64-bit Edition
 * Windows Vista Enterprise 64-bit Edition
 * Windows Vista Business 64-bit Edition
 * Windows Vista Home Premium 64-bit Edition
 * Windows Vista Home Basic 64-bit Edition
 * Windows Vista Starter

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SYMPTOMS
You connect a USB keyboard to a Windows Vista-based computer. Then, you view the devices on the computer in Device Manager. When you view the Driver tab of the parent USB host controller, you notice that you do not have an option to disable the device. The Disable button on the Driver tab of the parent USB host controller appears dimmed, and it is not available.

If you disconnect the USB keyboard from the computer, and then you update the view in Device Manager, the Disable button is available.



CAUSE
By design, Windows Vista works in this manner. In Device Manager, you cannot use the Disable button to disable the parent USB host controller after you connect a USB keyboard to the computer.

Additional query words: USBhid device attach unavailiable greyed out gray

Keywords: kbtshoot kbprb kbexpertisebeginner KB937650

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