Define the port (Little Icon next to the Computer selector drop-down menu).
Which port should you set? The right one and if there are more then one to choose from there is no need to test them all. Just look into the "Services" Tab (Your last screenshot) and see which COM port has been assigned. If you can't select it in the compaion just enter it into the port field manually ("COM 22", for example).
Windows 7 is just fine. No need at all to upgrade to Windows 10...
Hope this helps,
Why is it that with everything in life I always find a more difficult way of doing it (and not intentionally)