2 NW6.5 sp6 boxes run DNS for us, this is the primary. The primary server locked up and I had no alternative but to power off. This error may have been there prior to this but I was unable to switch screens and see.

I've attached the error, the only tid I found talked about getting a update from a AD dns server but we don't have that. DNS lookup is working fine so I'm not sure if the error is really a problem or cosmetic.