... Handles Run Process Explorer, and make sure the lower pane is enabled and configured to show open handles. (Click on View, Lower Pane View, and then Handles). Then open a command prompt and ... 155The handle index identifies the handle entry in the handle table. (Zero means display all handles.) The first handle is index 4, the second 8, and so on. For example, typing !handle 4 will ... View, and then Handles). You should see a handle containing CheckForOtherInstanceMutex. 2. Right-click on the handle, and select Close Handle. Confirm the action when asked. 3. Now run Windows...