I'm pretty sure you can run as many keyloggers as you want... That's the dumbest thing i've heard in awhile. There is no limit to the amount of keyloggers that can run at once. What would make you think that there was? For the record, odds are none of you were hacked, you just had your password guessed/stolen. To stop keyloggers, just check everything you download, and get a few protection programs. It's not a given that you will get spyware, in fact, if you are getting it, that means you didn't protect your comp. Buy/download some protection and your fine.