I am running seaclear and following progress on CPN to update when it looks like its stable. I have fried 3 used laptops trying to get a cockpit
2nd PC so I don't have to run below to view my main laptop
which is an old Itronix rugged unit. All run XP SP3 and it has been the cause of my problems. There are so many idiotic shortcomings to XP that it defies description. All come to light when using it for this specific purpose and which do not crop up in the office scene.
First you get USB com port migration so to cure this you can download a batch file from the net that zaps the applicable section of your registry to get rid of unused but registered devices like mice that have been removed from service
but still using the port - they cause the com port number to increase each time you reboot then the plotter prog can't find the GPS
Next look up "Can't wake up from Standby Mode" on the net. I have now resorted to an older HP TC 1100 which is a slate for the cockpit
but which is unique in that it comes with a detachable keyboard. This suffered from the standby "crash" when on its batteries and also when powered from 12v. This sounds like your problem. If you look at just the HP site there are literally hundreds of affected HP PC's - a full page text listing - probably thousands of other models that Bill Gates is getting richer on and doing nothing to assist. PC goes into standby mode and there is absolutely nothing you can do to wake it up including a 3 finger salute. Only Solution possible is to completely remove the standby option from all power settings by unchecking the applicable boxes. Look in control panel
Also get rid of all power saving settings that are set up on your USB ports
. Go to device manager - iniv serial
bus.. and USB HUBS - uncheck the applicable box that allows the port to save power.
To get access in a hurry if the PC goes down when you need the plotter I suggest you put icons on the desktop
for the registery port allocation reset (above), the device manager to save at least 5 mouse clicks, and notes on removing powers savings as a text file.