x64 Standard.
DC to which FSMO roles were recently transferred.
WSUS console installed recently and then removed. (Don't know if this
applies.)
Now, when going to any event log type getting "The interface is unknown" and
no events are showing. (Worked fine until, apparently, the uninstall of WSUS
console.)
Have now moved all FSMO roles to another DC but not tried demoting and
promoting again.
Any insight appreciated! Many thanks!