A book you can buy:
Oracle9i for Windows 2000, Tips and Techniques, by Oracle Press.
http://www.bookpool.com

Documentation that is free (several others specific to Windows are here as well):
Oracle9i Database Getting Started
Release 2 (9.2) for Windows
http://download-west.oracle.com/docs...a95490/toc.htm

If I wanted to learn windows 2000 pro I would have enrolled into a course that taught windows 2000 pro.
That is really not a good perspective of how you use Oracle. You do need to know aspects of the underlying OS, and a Windows admin class is not a bad idea at all. Necessary? No. But definitely helpful, not just for Oracle, but for other things as well.