A program running on startup is trying to connect to the internet ,Maybe something showing down by the clock .check Start/run /msconfig and un check programs not necsarry on startup.
Alist of what could be there ,you need to pick the ones you know you need running http://www2.whidbey.com/djdenham/Uncheck.htm
can anyone tell me why my dial up box comes up when i boot up .
There have been a lot of nasty porn dialers going around lately. Download the adware/spyware tool Spybot - Search & Destroy. The links are available from http://Security.Kolla.de, as well as discussion forums. As with all malware-tool software of this type, make sure that you run the updates before scanning the system for the first time.
You should be running a full-time virus scanner as well, and a firewall if you have broadband.