I have the same issues all the way around. I just fixed not being able to print an invoice / estimate and still cannot email either docs. I've done ALL the suggested "fixes" (uninstall, run fix tool... etc.. ) with NO positive outcome. I've resorted to printing to PDF and then emailing. Even though it takes up more of my time, it works. I've given up on trying to fix QB, as it seems unfixable..you know... BROKEN!