Clicking on web site URL hyperlinks in for example an e-mail, starts up Netscape Navigator 4.07, but the URL now no longer appears in the Location box, and the site does not connect. I have to manually enter the URL. Other web site links, eg from programs in the Start Menu also no longer work.
I have tried re-loading Navigator but with the fault remains.
It is possible that a dll file may have been removed by a system clean-up utility.
Any ideas what has gone wrong?

My OS is Win95 OSR/2 and I use MS DUN to connect to my ISP.