I've been successfully syncing various palm devices with my desktop system for several years and recently decided to setup syncing between my treo 755 and my laptop. I got it all setup and working, synced a few times over a few days, then one night couldn't get it to sync. I looked in the hotsync setup, clicked on the "Setup / Local" tab and got the message "The selected port, COM1, is not available at this time". In that same hotsync window, there is a drop down list for serial ports, but it's empty - no choices available (normally offers COM1 & COM2).
After some internet searching and unplugging and replugging of the hotsync cable and other USB devices (mouse and USB hub), I finally looked in Windows device manager and found that there were no ports listed. I believe there should be an entry for "Ports (COM & LPT)", but it wasn't there. I checked the BIOS, but could not find any settings for ports there either.
At one point I tried the Add Hardware tool in Windows control panel and was given the option to add a port. I tried that option and it managed to create a "COM4". The device manager now shows "Ports (com & LPT)", and a sub item for "Communications Port (COM4)", but it has a yellow "!" over it and in the properties window for the item it says:
"Windows cannot determine the settings for this device. Consult the documentation that came with this device and use the Resource tab to set the configuration. (Code 34)"
Maybe I should be in a forum dealing with COM ports and the such, but I've got to start somewhere.
I've got a Palm Treo 755, I'm using Palm Desktop 4.2 and Windows XP service pack 3 on a Toshiba A85-S1072 laptop.