Users had trouble logging in and working on our network. When checking things, discovered we could not view the group policies.
Found something here about the message we were getting and swapped PDC emulator role to another server.
This helped for a few minutes and then problem continued, and seems the policies folders/files under sysvol are corrupted on one server (explorer dies when we try to open them).
Copied the ones from the "good" server to the "bad" one (in safe mode, with reboots, etc). This seemed to help for a while (an hour or so) but the corruption (or whatever) has reoccurred again.
If the good server logs users in, they can work ok.
Recent change was installation of Arcserve open files agent (last night). Have now uninstalled and rebooted to see what happens.
In the meantime can anyone help and/or confirm the Arcserve link?