I installed version 4.2.5.879.
The problem is still the same.

Thanks.

I have a USB GPS product from LandAirSea.com (GPS Tracking Key). It uses usb to com port emulation. The USBSRService.exe blocks access to the virtual com port. If I stop the service and USBSafelyRemove.exe their software can see their product again. Windows device manager does see their product and ...