I have a HP Slate 21 that is connected to my Windows box using a USB cable. USB debugging is enabled on the device. After adding the proper
Looks like the installed driver was in bad state. Here is what I did to make it work:
Device Manager will find the driver and warn you about installing it. Select "Yes." This time the device got installed properly.
Note that I didn't have to modify winusb.inf file or update any other driver.
Hope this helps.