If you’re someone that uses Hotmail and uses one password for everything, watch out. Lifehacker posted today that apparently, 10,000 username/password pairs were leaked to PasteBin, a collaborative coding website. Many of these were e-mails starting with the letters A and B on the @hotmail.com, @msn.com, and @live.com domains, although most appear to be European based. If you have any sort of address starting with a or b or haven’t changed your hotmail password since high school, now’s a good time to change it.