Fiddler crashes on startup complaining about the Tahoma font

Sorry, you may have found a bug...

Fiddler has encountered an unexpected problem. 

Font 'Tahoma' does not support style 'Regular'.
Source: System.Drawing
at System.Drawing.Font.CreateNativeFont()

This can happen if you have the Microsoft Word 97 viewer installed. That tool sets the registry key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Fonts\Tahoma (TrueType) to tahoma.FOT. 
To fix the issue, change the following registry key from:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Fonts
"Tahoma (TrueType)"="tahoma.FOT"


HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Fonts
"Tahoma (TrueType)"="TAHOMA.TTF"

If that does not help, you may be missing the Tahoma font on your computer (it should be in c:\windows\fonts), or the .NET Framework installation is corrupt. If you see the Font file, then try reinstalling the .NET Framework and all updates from WindowsUpdate.

In this article
Not finding the help you need? Improve this article