>>Bruno;
>
>>There are many things to consider. I would start with the video driver or >video card. One thing I will not buy is a computer with its video source >built into the motherboard.
>
>>Tom
>
>
> The video card driver is the last downloadable (Matrox millenium G550 Dual head).
>About the files foxuser.*, I' ve deleted them, as explained in the first message.
>I' ve submitted the error' s log to Microsoft.
>
>Any other idea?
>TIA

Bruno;

Try a Microsoft Windows driver. You may loose features of the present card but this is only a test at this point. Your card has some interesting features. If using a plain Windows driver does not cure the problem I would substitute an inexpensive video card that does not support dual output to see the effect.

Being an electronics engineer and having worked with computers since 1962, I can think of many possible problems. Do you have another computer you can use for testing?

Tom