I applied patch MS07-058 KB933729 and restarted primary domain controller on windows 2003 sp1 (R2). Remote Procedure Call fails to start, message when I start it manually is 'access is denied'. It is a dependent on many other services like workstation, server, dhcp, dns, wins etc. Event manager says there is a 'SAM' error but I can't bring up detials on the error. I applied this patch on 3 other servers 1 (DC), 2 File Servers without problem. Credentials on rpc service is the same as all other servers 'NT Authority\Network Service' What happened?