font size

Hi I am trying to change the default font size in Outlook 2010 (via file, options, mail, stationary and fonts). When I click the Stationary and Fonts button it turns to blue background. Outlook then fails to respond for a while but never opens the form to make the change. I tried the Registry...

Posting this is the General Forum, realizing this might become a programming issue! So, I got a new laptop, still have the old ones as well. Using the same installation of Office 2007 on all my machines. Every machine receives new emails in very readable 11.5 font size except for this new...