NEC Express 5800/230Eh - Manual (Page 312)

D-20 Installing Windows Server 2003 x64 Editions
About Windows Activation
Windows Server 2003 x64 Editions must be activated before you can use Windows Server 2003 x64
Editions.
Windows activation process is as follows.
1. Click [Run] on [Start] menu.
Type as follows in the [Open:] box, and click [OK].
oobe/msoobe /a
2. When the screen as follows is displayed, click [Next].