Unfortunately, there is no supported method for determining the product key
from a working installation of Windows 2000. Please contact Product
Support per the following instructions from KB article 326246 How to
Replace Lost, Broken, or Missing Microsoft Software or Hardware
(
http://support.microsoft.com/?id=326246):
- Replacement of CD or Product Keys
To replace a CD or Product Key, you must contact PSS. To locate the
appropriate phone number for your product, visit the following Microsoft
Web site:
http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS
Mark Wilson [MS]
"This posting is provided "AS IS" with no warranties, and confers no
rights."
