How Do I Lock Down a System?

From: Robert Paris (rpjava_at_hotmail.com)
Date: 08/19/04 

Date: Wed, 18 Aug 2004 20:08:46 -0400

I want lock down a Win2k Pro system so spyware, etc cannot install. What
does this entail? How do I go about it? (And...what are the repercusions?)

I believe this means, no write access to system files and directories, or
the registry?

Thanks!