If this key is changed for any reason some applications may no longer display dialog boxes correctly.
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\FontSubstitutes\MS Shell Dlg REG_SZ Microsoft Sans Serif
For example if the key is changed to this value and machine rebooted
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\FontSubstitutes\MS Shell Dlg REG_SZ Tahoma
Paint then has a problem with its edit colors dialog box. The Red, Green and Blue box can no longer have 3 numerals entered into them. Only 2 can be entered.
