Adware:Adware (or spyware) is a small program that is designed to show advertisements (in various form and degrees of intrusiveness) on your computer. It often reports personal information back to its owners. As a result your sense of privacy can be violated.
EmailObserver is a spyware appllication that monitors all email communications on a PC. EmailObserver will silently copy any emails that are sent from the computer, and will send them to an email address specified in the program. EmailObserver program, if unknowingly installed on your computer, is a severe threat to the privacy of your email communications.
Technical details (How to remove EmailObserver(pop up))