The touchscreen sounds like it is failing, a common problem I'm sorry to say. Later models CF-18 and CF-29, and early CF-19 have touchscreens that often fail. You can replace it with aftermarket or maybe see if member Sadlmkr (Jeff) can repair it.
The GPS should be putting out NMEA text at 4800 baud on COM3. Try downloading a GPS utility like WinFast Navigator and see if it is putting out data. That GPS may take several minutes under an open sky to get a good fix.
Recently I worked on a late mode CF-18 that is running slow. I wonder if one of the recent MS updates causes issues with CF-18's? I've done it before months ago without any issues, but possibly a recent update is not compatible? Just a hunch ...
You know I was afraid you were going to say that the screen may be failing and that is a bummer but something I can live without, otherwise it seems
it seems to work great. The GPS works fine, I use it with MS Streets and trips. Do you have any idea why the touch pad is so sensitive the false clicks are a pain?
One final question: What do I tell wife when she asks why I need so many computers?????