You can read this from the systeminfo command
C:\>systeminfo ... OS Name: Microsoft(R) Windows(R) Server 2003 Standard x64 Edition OS Version: 5.2.3790 Service Pack 2 Build 3790 OS Manufacturer: Microsoft Corporation OS Configuration: Standalone Server OS Build Type: Multiprocessor Free ... Original Install Date: 20/02/2009, 10:34:22 System Up Time: 251 Days, 21 Hours, 49 Minutes, 24 Seconds
Use Administrative Tools -> Performance, then choose and log various measurements to file.
Sometimes jobs will clog up the print queue. You can restart the spooler by running:
net stop spooler net start spooler
This is still manual intervention, but is better than having to reboot the printer's computer.
You can run 'systeminfo' command to find out the Product ID. The last 5 digits will match the bar code on the left hand side of your authenticity sticker. They product key itself it not retrievable without other programs.
A collection of useful utilities are available from Windows Sysinternals. This is aimed at administrators and savvy developers.