Other solution that worked for me as below.
Background: came across this problem after Windows 10 Update yesterday. Searched the internets and TrackIR support, no provided solution worked. Using TrackIR 5 with 5.4 software and Windows 10 updated as of today.
Detailed issue I had: connected camera, but was not recognized. Camera was listed in hardware manager as unknown hardware. No LEDs would light up and in the TrackIR software no device was detected. The IR lamps on the TrackIR Pro Clip did light up though.
Solution: Deinstalled the 'unknown hardware' from hardware manager, unplugged and replugged the camera. In hardware manager right-clicked the unknown hardware, chose update driver, windows said there is no driver, chose manually install driver, navigated to the TrackIR software folder with the sub-folder 'driver' and let driver update check there - immediately found the correct driver and camera was working and detected as expected again.
Maybe helps someone.
