Hi, ive had this problem for sometime now and havent been able to solve it, my Vista SP1 MC, holds a lot of my movies/music etc etc. So when we got a second media center (also vista), i just decided i would set up shares on the first one so that both could have the same movies. This all works fine most of the time, however at some point 2 of the XP machines and the other Media Center will stop being able to access the machines "may not have rights, contact admin" is the message they get....My own vista computer can continue accessing all the shares without any hitches. When i look into the VistaMC (sharing) event viewer i see hundreds of event ID 2017 "The server was unable to allocate from the system nonpaged pool because the server reached the configured limit for nonpaged pool allocations." messages and in the eventdata i see \Device\Lanmanserver so this is obviously the problem with network shares being denied. Ive tried doing all the various registry fixes from microsoft such as MaxMpxCt, MaxNonPagedMemoryUsage, MaxWorkItems, Size etc in the Lanman section, but nothing gives, whilst typing this message the vista MC is using 1.1GB out of 2GB of memory has over 300GB of spare harddrive and is giving me the errors, also i dont see any process's with massive amounts of memory/handles etc being used, so i cannot understand why the machine would be out of resources. Checking the current logins to the machine shares so 1 in use, so that the 10 user/file (cant remember) limit is not the problem either. Does anybody know how to solve the issue?