I have two 2003 R2 servers different hardware configurations but same software configurations. They both except RDC connections from pxe booted thin clients (ubuntu 8.10 server running ltsp provide boot images). Load balancing places approximately 25 users per server. This solution ran perfectly until about a month ago. Servers just reboot seemingly at will. I was stable after having the servers reboot themselves nightly (not a great solution but it worked) until today. Both servers have rebooted themselves. I can't find anything in the logs to clue me in but I am also not well versed with windows servers. I've tried the normal stuff. Defrag, HD repair, antivirus, and spyware. I even rebuilt the raid arrays. Nothing seems to be wrong. Can anyone help point me in the right direction?