Hi. Sorry to hear about your concerns. There is a chance that a hacker has been in your pc and had a little look around. Its getting quite popular now is hacking If a hacker has entered your pc then there is a good chance that he/she has left you a nice little present lurking around on your hard drive. This present can be a virus or some dodgy pictures or something like that. Hackers just dont hack in to just look at your hard drive or folders, unless they are after something from you. If you are high up in a big corporate company or something like that, then maybe you would be a target for someone, but if your just an ordinary pc user like most of us here then i wouldn't really worry too much. Your Yahoo messenger is open to abuse, the best one is the microsoft one as this has been revamped recently and has some good security added into it. Keep well away from ICQ. That's just the worst for hackers getting access to your pc. I recommend a nice bit of software called Zone alarm pro. Have a look at the website and download it. It tells you everytime someone attempts to hack into your pc. You will be amazed how often someone attempts to hack you.