Hey,
Haha, if you dont want them to start to gain access to your computer than i reccemend that you unplug you intnernet connection. Then scan your computer for viruses/trojans in safe mode...then hook up your connection again and go to http://www.kerio.com/us/kpf_download.html and download their free personal firewall that can keep out any outside intruders and logs their IP.

If you dont have an AV software then search for a freeone at www.download.com

-s3nate