OK, Here's one I've never seen before. I'm running AD on a Win2k8 64bit server. Suddenly, this morning it started displaying the network computers list in Explorer in a strange way. The list is being displayed two or three computers at a time for a second at a time. Then the list will refresh with other computers in the domain being listed for a second before being refreshed again. And so on and so on, repeatedly cycling through the whole list. The other computers in the domain are well behaved. What is this all about? Any suggestions for a remedy? Thanks for any help.