Solution 1:

As you found your answer, repeated below, then adding your solution as an answer and marking it as the correct answer means this question will no longer appear on the "unanswered" section of this site.

Windows Registry Editor Version 5.00

; Created by: Shawn Brink
; http://www.sevenforums.com
; Tutorial: http://www.sevenforums.com/tutorials/1175-fonts-change.html


[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\FontSubstitutes]
"MS Shell Dlg 2"="Tahoma"
"MS Shell Dlg"="Tahoma"