I own my own domain name and email addresses and have always configured Outlook with Windows XP without any problems. I have now bought Windows 8 and on configuring Outlook it worked fine. Then I had intermittent problems with clients saying they hadn't received emails i'd sent, although they were in sent items. It then intermittently wouldn't download my email and would work on a restart (although Windows 8 won't restart any more, it just hangs so I have to shutdown and then turn it back on - another problem!).
I can't use Outlook at all now and wondered if you have a fix for this please Microsoft?