"paul" <kaartenlezer@yahoo.com> wrote in message
news:1134992379.543899.271100@g49g2000cwa.googlegr oups.com...
> The keyboard works fine when I plug it in on my son's laptop, but so it
> does when I plug it in on my desktop. It's only after some hours of
> usage that it locks up, I havn't got the chance to get hold of another
> PC so long. I still hope that it is some kind of software conflict
> that pops up incidentally, but you're probably right that it is a
> hardware problem. Would that be a replaceable device on my motherboard
> ? I have 8 USB 2.0 connectors of which 6 are in use and continue to
> work fine (printer, PDA, camera, scanner, and GPS) when the keyboard
> locks up, so I assume the USB interface is OK. But when the keyboard
> doesn't work, Windows says that the (keyboard) USB device is not
> recognised...
> paul
>

Hi Paul
Unplug all USB devices exept keyboard, and try that for a length of time.
If it works ok then it seems that you may be overloading the USB port
voltage
if so one solution would be to buy a "Mains Powered USB hub".

Chas