How to Regain Control of a Hijacked Twitter Account

Someone logged into your Twitter account, and that someone isn’t you. They’re probably a spammer hoping to inundate your followers with junk, or maybe a “hacker” (in a very loose sense) being paid to follow other accounts. It’s just possible that they’re intentionally targeting you and hoping to make you look bad. Whatever the circumstance, you want to kick them off your account on the double. Here’s how.
by Michael Crider via How-To Geek