Unwanted porn diallers – deletion of.

I have a system running Windows 98 and recently a porn dialler has surrepticiously installed itself onto my system. The result is that each time I connect to the Internet, a premium rate line is called up.

The short cut has been deleted from thedesktop as has the entry in dial-up networking but each time the computer is rebooted, the icons reappear.

Assuming this is a registry problem, where do I find the offending entry? If it isn’t, then how can I delete the connection without havingto reinstall the machine?

Many thanks!