IE Font are bigger or smaller than normal

>I can't tell you what caused the problem, but let me point out that
>using Ctrl+Wheel Scroll to change the size is a Windows standard and
>works in *most* applications


Hi I still having problems in some applications it looks normal,
first
reboot, later changed its size, in other application the fonts are
still bigger than normal, In other applications the fonts are smaller
than normalI I think I can fix this (not sure) entering to the
windows
registry (regedit) but I do not know what to change in order to fix
it

There is no virus, I checked my computer with Lavasoft, Zone Alarm
Pro
and BitDefender
I did not install or uninstall another application before this problem
I only cancelled
the Microsoft Office 2003 Installation (Spanish Checker or something
I
do not remember...)


What other options do I have to fix this issue?


TIA
Antonio Macias