Identify processes which are holding a USB port open

1. Download and install the STU HID Diagnostic Tool  

2. Download and install either of:

   • handle.exe
   • Process Explorer
      

3. Open up a command prompt and type: hidinfo kernel  

4. Locate the STU tablet in the list (the line will begin "056a.00a....").
    

5. Take a note of the text inside the quotes of the statement "kernel=..." (for example "\Device\0000006b")
    

6. Determine processes that have that tablet open using one of the following methods:
    

   1. Using handle.exe (command line):

      • Open up an elevated command prompt and type:
      • handle -a "???" (where "???" is the device name that you tooke note of above, e.g. handle -a "\Device\0000006b")
      • This will return a list of processes which have a handle open on the tablet
         

   2. Using "Process Explorer":

      • Open up Process Explorer with elevated rights.
      • Select the menu item, "Find" -> "Find Handle or DLL".
      • Enter the text you took a note of (without quotes) into the box and press the search button.
      • This will return a list of processes that have a handle to the tablet.