In the last two months I FREQUENTLY find I am not able to go to or open certain messages. When I try I get the message "could not perform operation because the default mail client is not properly installed". I have gotten that message when I have been seeking information at a site that is not questionable, or when I have tried to click on an attachment or, the most recent when my daughter tried to send me pictures her daughter had sent her. When I tried to go the the granddaughter's email I got the same message. It is very frustrating. I could see it if I were going to weird sites or questionable or whatever, but not when it is to a site I feel I should safely go. And, as I said, it has been happening a lot in the last two months when before it happened only rarely. I did go to a site, don't remember which one but it appeared to be sponsored by MSN, and could not find any help or usable information. If you can help that would be great.