I’ve been a big advocate of AVG anti-virus as a free solution for home users. Now I’ll tell people running Windows to go with Microsoft Security Essentials.
I’ve installed it on both computers here at home and now issues. One is an older computer running XP and the other a newer one running a 64-bit version of Vista. Installation was easy, the GUI is simple, much better than AVG’s GUI, and the independent reviews have been good so far. Ignore the press releases from Symantec and McAfee, they have a vested interested in Microsoft failing in offering a free anti-virus/anti-spyware product. Bill Mullins has a nice write-up on MSE, go check it out.