I have it sorted now and thanks for all the help which I did try but gave-up and did a system restore.
The problem happened after I was advised I needed the new version of IE7 only prob I was already using IE7 but you know computers it would have kept telling me like the wife nags me (only joking) so I let it download the new version I already had.
When all was re-started I opened my email client and checked for new messages from CF (sad git) when I clicked on a hyper-link it opened a window asking what prog I wanted to open.
Yes I had Firefox as the main browser (don’t we all) but like I said I did a system restore
Thanks and even more thanks,,,,,,,,,that’s it there is no more