I have a MacBook Pro running OS X Lion. This morning when I turned my machine on I went to log in and my password was incorrect. This frequently happens because of spelling mistakes, caps lock is on, or I'm rushing. After trying my password about 20 times it still wouldn't work.
I am certain my password changed overnight.
I used my Apple ID to create a new one. Has anyone experienced this before? Does this warrant a reinstall? What measures should I take?
I searched Google for malicious processes that I should be looking out for. I could not find a comprehensive list. How serious is this? I changed my password; is that sufficient?