I've been using AVG anti-virus software for some time now - it's free and seems to work well. Updates are regular and also free.
Another really good investment is a program called 'Go Back' which allows you to revert your hard disc back in time, to a point where everything was working OK. You can revert your drive even if you can't boot into Windows since the program initiates before Windows loads. You can also selectively recover files after reverting. It has got me out of 'bother' quite a few times. It really is worth the money!
Anyone interested should have a look here
http://www.roxio.com/en/products/goback/ ------------------
Willum
[This message has been edited by Bill Norrie (edited 06-09-2002).]