Interesting network security Question

Here's a link to what nihil suggested...

http://www.samspade.org/ssw/
/ssw/

Eg ;)

And if nothing comes up, I would look into grabbing a rootkit detection kit that is up to date

A quick something that nbody else seems to have mentioned here. You say that you use a dial up connection right. Unless you have a fixed IP (can you do this with dial up?) then your IP address will likely change every time you connect. I would say that it is possibly some kind of malware installed on your end (as do most other people by the looks of it).

Also, this will probably be a bad suggestion, but has anybody considered some type of hardware problem? If it persists with a clean install could this be a possibility?