This problem has been plaguing us for some time. We are a high school which has a NAS which contains most of our data shares including staff, students, and our grading program. We do folder redirection for My Documents so the server gets used quite a bit. Last year, we had a 725N NAS which had been running fine. Then, all of a sudden, it started freezing every few weeks (you could ping it, but it would not reconnect shares; for example, if a user tried to open my computer to access a mapped network drive, explorer would freeze on their computer). At first you could generally access the server through remote desktop but after a few minutes that session would disconnect leaving you no choice but to do a hard restart by holding in the power button. We went through troubleshooting with Dell and they pretty much sent us all new guts of the server, but we still had the problem. So, we retired that NAS and bought a 745N. After installation of that NAS, we are again seeing the same problem. We have tried different cables and a different connection to our network. In fact, right now I have load sharing between the 2 GB NICs enabled going to 2 different switches. Nothing ever appears in the event logs. The problem always occurs during the school day (when it is most in use), but otherwise there are no predictable patterns. Also, periodically, if you click on “sessions” under shared folders in computer management, that application will slowly trickle in user names (maybe 1 every 3-4 seconds) and will eventually freeze that instance of computer management. Does anyone have any ideas of what else to look at? As you can imagine, we have some pretty unhappy students and staff when they keep loosing their work every few weeks because of this! Thanks in advance for your help.