I'm having the same problem. Did the proposed solutions fix this problem?
I've seen this problem posted a couple of other places but no confirmed
solution.

Thanks,
Geoff

"Corn" wrote:

Windows XP Pro, IBM Laptop
Uninstalled Novell Groupwise email program
Installed MS Outlook 2003, program appears to work as advertised when I
start it and I am successfully using email, calendar, tasks, etc.
However, anytime the email is invoked from clicking on someone's address
link or from a visit to a website, IE goes nuts. It opens 50-60 different
windows of IE, apparently until it runs out of memory. I then get an error
message in a box that says the default mail client is not properly installed.
Only way out is hard boot. Outlook is definitely set as default mail system
in IE Tools. I have also tried to run outlook.exe /checkclient with no
result (found this in technet)
How can I fix this problem?