It has been all over the news this week of April Fools, so a quick summary on what to do if you're concerned about family computers getting infected: You can see if your computers are ok by checking if they have MS08-067 installed. How? The exact steps depend on what version of Windows is on the particular PC, but they go pretty much like this: Go to Start > Control Panel > Programs > View installed updates. If you see among them "Security Update for Microsoft Windows (KB958644)," your machine's all set. That update was issued last October, so if your family's doing automatic security updates, everybody's fine. If you don't see that update in the list, go to Microsoft.com, search for the MS08-067 security update, and install it. Here's CNET's live blog on the Conficker worm, TrendMicro's guide, Symantec's guide, and ConnectSafely.org's Larry Magid talking about it on NPR's Talk of the Nation. For more advice and resources on computer security here.