Hi I am running an SBS server with V4. I upgraded v3 to version 4 and pushed the installation from a ERAS server which did the update. Now I see high CPU usage on the server. When looking at the services, I see that ekrn.exe has high cpu usage and drops and raises again...and that keeps happening. Egui.exe is normal...low CPU usage. Clients are unable to connect to the exchange server running on this SBS box. What may be the problem? Rachiano.