To address this issue, you can follow these steps:
1. Download the JoyIDs tool
2. Install the program on your computer.
3. Run JoyIDs, and you should see a list of your connected joysticks.
4. Identify the joystick that is causing the problem (it may be highlighted in red or not showing the correct ID).
5. Double-click on the problematic joystick, which should highlight it in green.
6. Choose a different ID number for the joystick by clicking on a different ID# in the list.
7. This action will fix the entry in the Windows registry for that joystick.
8. If you want, you can move the joystick back to its original ID# afterward without affecting anything else.
Following these steps should help resolve the issue of missing or incorrect registry entries for the joystick, enabling FSUIPC to function properly.