It sounds like these 3 PCs are alone in a peer-to-peer network setup. If that conclusion is wrong, please correct in a reply.

I assume, too, that these PCs all communicate successfully with the network using other software.

My strongest suspect would be the video drivers, but only because VFP is known to exhibit bad/strange behaviour with many such entities. Perhaps you could try installing the MS 'generic' drivers on one machine to see if that makes a difference.

good luck


>Thanks for your answer Jim
>
>What does it do (or not) when it "hangs"?: The system stop responding, ever the mouse pointer is stopped
>
>Are the 3 PC connected to the network?. Yes, but without the IPV6 stack, source of problems.
>
>Are they the only ones with XP Pro, or are there others?. all three have XP pro.
>
>Is there virus software active? (workstations and/or file server). Yes, but on the reinstalled unit it is not installed.
>
>Are there any other PCs with the same integrated video that are working OK?. No, all three have the problem.
>
>Answers to these may help with ideas.
>
>Thanks a lot Jim.