How do I fix a worm that affected my computer? Its long but i need help!!!?

At work the man I worked with got a virus opening a picture and when I am not there he tends to use my computer because its faster, I have important information about payrolls and financial info about the company and I can't afford to lose it. Thanks  [url=DAILY-MOTIVATION.INFO]daily motivation[/url] [url=HOW-TO-STOP-PROCRASTINATING.INFO]how to stop procrastinating[/url] [url=OVERCOMESHYNESSEASY.INFO]overcome shyness[/url] [url=THE-POWER-OF-YOUR-SUBCONSCIOUS-MIND.INFO]the power of your subconscious mind[/url] [url=IMPROVE-CONCENTRATION.INFO]improve concentration[/url] [url=100PARENTINGTIPS.INFO]parenting tips[/url] [url=EASYSTRESSREDUCTION.INFO]stress reduction[/url]