I have searched but can't find an answer to this problem........
Some of our users are getting an error message during logon to the effect that their profile cannot be downloded because of a network problem or permissions problem.
Our application logs show an event code 1504 and the error "Windows cannot obtain the domain controller name for your computer network. (The specified domain either does not exist or could not be contacted). Group Policy processing aborted."
I've swithced on the logging feature and can see errors "ProcessGPOs: Processing failed with error 59" and "ImpersonateUser: Failed to impersonate user with 5".
When pinging clients from the server we get very erratic ping times.. sometimes sub 1ms sometimes a negative number.
Thing I've tried so far: reboot switches, check DNS is all OK, manually point clients to DC, install latest Gigabit Ethernet card driver.
Would be greatful for any help!