screen size in design view

Hi, Please help, this is driving me crazy! I had to "repair" internet explorer
in Vista, which seemed to go fine. (reinstall the software) Dreamweaver kept
all my files ertc. but looks very different now. The font isn't like it used to
be and the main thing is that the Design view of the page is 1/3 larger or more
than the actual page size. Which to me is annoying. After I work on this large
page for a while then check the site it looks tiny! Also at this large size
some text renders differently then it does when you check it in a browser. I've
looked everywhere, can't find a setting to correct. I want it to appear in the
actual size it will appear live like it did before. Is this Dreamweaver or an
IE setting? I was thinking I.E. setting but all other programs, browsers etc.
render normally. (only the most important one to me is #$%@'d up! HELP!