Good day, I have experiencing a bit of trouble with one of our PCs crashing. the machine is brand new HP dc 7900 CMT running XP sp3. I have not witnessed any of the problems directly as the machine is aboard one of my companies ships. The symptoms that are being described are that the machine has been rebooting every 20.40 minutes. the machine was then turned off overnight and then run continously for 7 hours or so before the same thing happend. I have asked the crew to cary out various trouble shooting steps including reseating the RAM and sending me copies of the mini-dump files and the system logs, however they are not particularly IT literate am I dont want to ask them to do too much incase it all goes pear shaped. any how I have taken a look at the mini dump files and it appears to me that a file called diwan.sys may be causing a problem. I believe that this is the driver for the Dialogic Diva ISDN usb modem that we are using onboard. It may be that we can simply get them to update the drivers and that would fix the crashing. I would be grateful if some one here can take a look over the attahced mini-dump files and advise me if this is the case or not and to point me in the right direction. Thansk for your help!!