No communication between the computer and the weather station

I think you said you were using Vista Bashy. There was a prob with XP with this and was found to be related to XP showing a “ball point mouse” when properties were checked. I don’t know if this is in Vista, but as it’s a refined development of XP I would expect that it’s still there
The solution seemed to be to DISABLE (not delete) the ball point mouse and all seemed to be OK ref the comport error message on the title bar.

Edit:
Device manager > mouse click on + (see this post/thread)