I want to know the title of this movie, in which a married man disappointed an IT specialist lady?

I want to know the title of this movie, in which a married man disappointed an IT specialist lady. The lady got to know the man was married when she mistakenly had a pc chat with the wife using the man's laptop and decided to pay the man back. She disorganized anything the man did including emptying his bank account. It was somehow similar to OBSESSED (featuring Beyonce) and FATAL ATTRACTION (featuring Michael Douglas)