I use the internet regularly with no problem. I send and get e-mail. All my internet settings are default. But when a program offers a link to their technical service, and I click on the link, I always get "Could not perform this operation because the default mail client is not properly installed." I don't even know what a default mail client is. So I go into e-mail and write them at that address and it works. What setting do I have wrong and what is a client?