GPS Position Unreliable

My Compaq 3850 with Tom-Tom displays "GPS Position Unreliable" all the time, even though there are multiple satellites displayed when GPS status is checked and the GPS to PC link is showing active.

I have loaded TT3 and a new SD card, also reverted back to TT2 and my old SD card, but still the same display.

Any ideas

[Stevie]

What version of the GPS driver do you have ?

Click on start, tom tom GPS, GPS, bottom right under the globe v3.03?

Ver 2.0 265/330