Device driver not listing ports (COM)

Acer Aspire one aod255-2509 10.1" led ne...
January 2, 2011 at 19:51:43
Specs: Windows 7 starter, Atom D255/1GB
I installed a prolific driver PL2303 ( Win 7 version) for a USB connected GPS to work with Seaclear navigation program on an Acer AOD255 netbook running Win 7. Two problems came about:

1) "Jumping or crazy mouse" of the navigation software where the pointer just goes mad as long as the USB Gps is comnnected. I was told this is as the prolific driver is seen by windows as a serial device and was recommended to disable the ball pointing mouse. With this done it solved the problem temporarily but the problem returned. After uninstalling and re-installing the prolific driver, the 2nd problem appeared.
2) Device Manager no longer listed Ports COM & LPT), so I am unable to see which COM port the GPS is connected to. I need to tell the Seaclear program where it is.

Can anyone help?

Processor Atom N550 1.5GHz; RAM 1GB; Windows 7 Starter;32bit;

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January 4, 2011 at 15:27:16
Downloading a freh driver from solved the problem as long as the serial usb device is only plugged in after windows has fully settled. Mysteriously the device manager now again lists ports (COM & LPT).

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