Free AV for Win2k Svr?

I have a Windows 2000 Server which I obtained through my Uni's MSDNAA
subscription. I've been using AVG6 (Free) on it, but that's now been
discontinued. AVG7 (Free) won't work with server OSes, neither will the
version of McAfee that the Uni provides for free. Avast! Free won't install
on it either.

Can anyone recommend a free AV program that will work with Windows 2000
Server?

Thanks in advance,

Dave
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