Mouse Cursor Jumps around the Screen when the GPS is Connected
For more information, we suggest you go to www.google.com and do a search on something like "gps detecting mouse device".
"Serial Device May Be Detected as a Serial Mouse in Windows 2000" (XP is also discussed in the document)
http://support.microsoft.com/default.aspx?scid=kb;en-us;283063A method which should stop it happening is included below. We got this from a newsgroup and have had reports that it does work.
1. Boot the computer with the GPS receiver attached. The cursor will be jumping around and all sorts of unwanted stuff will be happening.
2. Disconnect the GPS. The computer will settle down.
3. Select Control Panel - System - Hardware - Device Manager.
4. Click on the "+" next to Mice and other pointing devices.
5. Click on "Microsoft Serial Ball Point" - This is what Windows 2000/XP thinks that your GPS receiver is.
6. Select "Actions" and then "disable".
7. Click "OK" to close each window
8. Reboot the computer with the GPS attached. All should be well.
The next time you boot the computer, it will tell itself to disable the "Serial Ball Point". If you boot the machine without the GPS attached, it will not even show the disabled device.