I dont understand why its not possible to remove the serial mouse drivers all together from windows.
I have been messing with this issue in windows for over 12 yrs and since windows 7 came out no matter what fix you apply it comes back.
Although most of us techs can solve it. But when you have a customer who you installed a plotting navigation program on their PC and they take the PC off the boat for security and reinstall it the next day it comes back.
I'll tell you one thing the first tech to actually solve this can sell that fix for a lot of money.
so far i have managed to get windows 7 to not reconize the gps data as a mouse but an unknown device and still have use of my com ports for the varied programs once i get it to an *.exe for all then I will share my findings.