A similar problem occurs with earlier Windoz versions (98 and 2000). ALWAYS start your notebook computer and let it completely boot and login before connecting anything to the serial port. I found that if there is a GPS connected to the serial port as it is booting, then Windoz thinks this is a mouse and ignores the mousepad or the USB mouse and instead the cursor jumps around the screen as you described. The solution is to shutdown the computer and reboot without the GPS connected until Windoz is already running. Then the OS already knows about the mouse and knows that it is not on COM1.
73, Jeffrey Pawlan, WA6KBL _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
