The subject errors:
RPC 1792 - The remote procedure call failed and did not execute.
Netlogon 5719 - Unable to find domain controller.
can be caused by too many connections to a remote share, causing Windows NT to exhaust MaxMpxCt or MaxWorkItems. Use regedt32 to navigate to:
Edit or Add Value names: (both are type REG_DWORD)
MaxMpxCt - The default is 50, the range is 1 - 65,535.
MaxWorkItems - The default depends on your configuration, the range is 1 - 65,535.
NOTE: See tip 1123.
NOTE: Increasing these items can also improve server performance.