My Microsoft Mail has suddenly been reformated

Finally, someone with the same problem I had when looking at the picture. At least 3/4 of mine came out in what the MOD called HTML. I called my provider and sure enough was a problem were I hadn't updated something at my end. That was done, but now I have to hit the refresh button 2-3 times a day to get any pending incoming emails although the setting is for hourly checks. If I go to Yahoo mail, everything is on time and readable.