>It appears that Norton Anti-Virus has stopped making the update subscription for Windows 2000 Server for the 2001 version. I used to be able to update my anti-virus dfeinitions, etc. but this time around, they want you to upgrade to a newer version, but the newer versions don't support Windows 2000 Server.
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>What do you do next?

I strongly suggest you take a look at Symantec AntiVirus Small Business Edition 9.0 - its the corp edtion of Norton Anti-Virus - works extreamly well and take up almost no resources to run it (which compared to most other anti-virus products, including Norton 2000-2005 is quite nice).

http://www.symantec.com/region/hk/product/sav/sav_sbe/

I have never bought anything from ebargainsoftware, but they have it for a reasonable price.
http://www.ebargainsoftware.com/syan90smbued.html