I may need to update the libusb driver included in flirc, however, I'm not sure if the following suggestion will get you the latest, but it's worth a shot. Make sure Flirc is closed. Download a tool called zadig The tool is official and part of the libusb development tree for windows. You'll need a tool like 7zip to unzip the utility. When you run it, find the flirc device in the pull down, and make sure you click WinUSB from the second pull down. Then click Install/Reinstall Driver.