Nextar gps updating
There are processors in the hand control (HC) and there are processors in the base of the scope in a section known as the motor control (MC).
The MC firmware can be updated by the owner (read this).
Some have had success using Windows 95 but Celestron will not provide assistance for Windows 95 users.
After downloading and installing HCupdate from the Celestron Support Downloads web site, start HCupdate and read through the Help information.
After updating the firmware, you should run the Calibrate Goto procedure on the Utilities menu of the hand control.