My problem is Outlook e-mails. Every time I click an e-mail several popup windows come up as I had described before. Regarding option button when I type 'Use Firefox' nothing comes up but if I leave blank severalcontents come up but nothing related to 'Outlook'. I was worried about deleting all contents type. I deleted 'mimeTypes.rdf' according to your suggestion and restarted computer but problem remained. Futhermore I get a pop up as follows ' general failure. The URL was https:// support.mozilla.com/questions etc' can not be found' but it takes me to this page any way. Please help