About a month ago I could no longer connect to the internet on our PC. Every time I clicked on the Firefox icon the Netscape sign-on window would pop up. I would try to close it but it would pop up over and over again. If I tried to close it a dozen or so times eventually Firefox would open up but it would never connect. Just today I moved my Netscape file to the recycle bin. No longer does the Netscape sign-on window pop up but following Network Connection error message pops up: "Error 623: The system could not find the phone book entry for this connection".. This error window behaves the same way the Netscape sign-on window used to behave. Every time I click to close it it pops open again. After numerous clicks Firefox opens up but it never connects.