Font sizes

do you have the same problem on another pc? is there an antispam filter installed? I once had this issue using GFI maildefense suite,
there was a patch to resolve this

I have disabled the antispam filter in Kaspersky but still have the problem

check:
http://email.about.com/od/outlooktips/qt/et_default_font.htm
zoom: http://www.office-outlook.com/outlook-forum/index.php/m/243337/
http://www.slipstick.com/outlook/email/to-change-the-font-on-incoming-messages

No luck - I have also disabled Word 2003 as the email editor in Outlook.  I am getting the same behaviour in Word - the text shows up as normal then on its own volition sets off on an enlargement journey of its own.  I thought it might be something to do with the wireless mouse so I changed it to a wired mouse - but still the problem!!

Further problems - when I open an email with attachments and try to open it the attachment disappears - the same happens if I hold the mouse over the "From" and "To" buttons.  I managed to open a PDF File and the same zoom effect happened - could this be a virus?

Thanks for all your help

it isn't normal behaviour for sure, try starting up in safe mode and see if this still happens
run a thorough scan of the ps and check the installed programs

The MS Office seems to have righted itself - I now am faced with my web browser automatically zooming to 640%!! Trying to reset the zoom controls in IE and Chrome has absolutely no effect - it reverts back to the high zoom settings. Help!!