Charming,
thanks for the response - the whole set up is brand new, the dealer set it up and it was working fine until it started to freeze up, some functions then wouldn't work, and then the "cannot read SD card" error came up. The dealer is coming later today to do another lesson and I have let them know about these problems.
I am concerned there might be a major flaw in the computer?
Not too pleased with the dealer thus far in the process but that is not for discussion here. I am taking it up with him and his head office.