I find out that they have been in my computer becasue i am always missing a file. Also when i am on aim or surfing the web somebody else is clicking around on my computer and doing something totally different. Sometimes they use my system to hack other people that is really my main concern becasue soon or later i will get in trouble for what i didn't do. I think they use ftp or they hijack my Ip I'm not really sure. I really don't know what my comfiguration was when thet do it but i will try to see if i can remember. Thanks for your effort and hopefully that will help you think of something.