Examine Mini-Dump file. Tell me why PC keeps rebooting

Take a look at our mini-dump files and tell us why our PC keeps rebooting every so often. We believe we already know what the problem is caused by... but we want a 2nd opinion. By viewing the logs files, someone with Windows XP or Windows diagnostic experience should be able to read the log files and tell us what is crashing our system. They should be able to identify the hardware and software driver from viewing this log set.