IE 8, OE 6, Windows XP
Email address links give that error that this client is not installed properly.
I have read and tried just about all suggestions, including
START | RUN
regsvr32 sendmail.dll
regsvr32 "%ProgramFiles%\Outlook Express\msoe.dll"
"C:\PROGRAM FILES\OUTLOOK EXPRESS\MSIMN.EXE" /reg
regsvr32 urlmon.dll
regsvr32 softpub.dll

In my File Types, there is no URL: Mailto Protocol. I try to add a New and am
prompted for File Extension. What goes here? I assume I put something in
this field and then will be prompted to put that Mailto Protocol (space clarity).

Earl