1) This is a local issue that you need to look at TJ. I'd scan the machine for viruses and spyware. If it a Windows machine, I'd go so far as to use a tool like ComboFix since it gets some of the really hard to detect/remove malware. Don't assume that the protection you have on that computer is working at this point. Most modern malware targets any protection software and disables it while leaving the user the impression it's still functioning.
This is my work computer .... supposed to be secure !