NEC N8100-1644F User Manual page 466

5.
Read the message, and then click [OK].
The update starts.
NOTE:
The following box appears during the update if you have
deployed a full installation of Windows Server 2008. Wait until the
update completes.
6.
When the following message appears, click [OK] to restart the system.
The system has been updated.
Installing Windows Server 2008 E-23