I don't want to sound paranoid but I am annoyed. I have a stand alone system at work. The only connection I have is a phone line for my dial-up. Somehow, everyday i turn on my system and have a feeling that someone got in my system either copied my working files or messed up my data files. Here and there I found some files that were not initiated by me in webpage format event with an address of ftp. Some of my reports were incorrected because the data were switched places. I put a password in bios. My windows xp does not have guess account turned on. I am the only one has the passwords. Once I encrypted a file contends all my passwords. A month later I could not open because that file had a different user id (???) . I could not even delete it . Few months later I was able to delete it. I changed most of my passwords since then. I can't physical lock up my office. Can anyone gives me some hints about the intruder? I know he/she was in my system.I know he/she mess up my files. I got blames of my reports full of wrong data. We have a wireless network but my second computer connected with the server by local lan. My second system connects with my main system through a usb bridge. Most of all I am not in a friendly term with my IT manager. Thank in advance for save me a trip to a mind doctor.