Hello, I have two completely separate SBS2003 domains and on both of them I have some problems which seems related. Ones every 14 days (give of take a day) the server spontaneous reboots (one location) and on the other it’s even a complete shutdown. There isn’t any heat problem on both locations, one is on an UPS so power problems are also not likely. I heard something about a reason off these reboots could be related with not “good†registration of the domain/license with the SBS installation. Could this be true? There isn’t anything in any eventlog. On one off the servers I did run memtest86 to check the memory and after 2 days there where still no problems reported by memtest. Does somebody knows if the problems are related to registration errors? And how to correct these. With kind regards, Maurice Lucas