OK,
Interesting update for you (maybe)
I installed one of M$oft security updates last night and re-booted. When I went to download todays rides, I got the message - surprise! "Com Port couldn't be opened"
So I looked in Device Manager, and under USB controllers, it had an unknown device, and the Polar USB device had disapeared.
I re-installed the software, still no luck. Then I went back to read the install instructions again (when all else fails), and it said to make sure you unplug the usb device before installing. When I did that, re-installed, and plugged in the Polar USB IR device - It was there in Device manager, and - It worked!
Now if the weather would just clear up, I only have 70 miles so far this week, and more rain coming! :-(