Zombies are a pervasive cultural theme these days. We have no shortage of zombie-apocalypse movies and literature, and the United States military and the Center for Disease Control even offer tongue-in-cheek zombie-response plans. But there are other zombies that don’t get the attention they deserve—the zombie accounts you have lingering around the Internet.
Stop and consider how many different websites, social networks, and other online services you’ve joined over the years. For that matter, think of all of the software, mobile apps, browser plug-ins, and other things you’ve installed on your PC or mobile devices.
How many of them do you use on a regular basis? And how many of them still link to your Facebook or Twitter profiles? More important, how many of them do you actively manage and update to ensure that they’re properly protected?
Here are the dangers to watch for, plus a few tips for dealing with the user accounts that just won’t die.
The undead: A major headache for the living
I haven’t used MySpace.com in ages; it has probably been at least five years since I’ve even logged in to the once-dominant social network. But as it turns out, I still have an active account there. I needed a couple tries to recall (or guess, really) my login email and password, but I got in.
Once I logged in, I found information about where I lived and worked, and a few invitations to play online games from early 2009, as well as connections to friends and their personal information. I can all but guarantee that none of those friends has thought about MySpace in years, either.

Full Story: How to prevent ‘zombie accounts’ from haunting your digital identity | PCWorld.