You may get this error if the Courier New font is not installed, or is corrupt, on your Windows O/S.
To correct this:
1. Navigate to: 'Start->Settings->Control Panel->Fonts'
2. Look for the 'Courier New' font file (cour.ttf)
3. If the file exists, double-click it and you should see sample of the font in use.
4. If the file does not exists or is corrupt, you will need to copy it to your system, navigate to 'Start->Settings->Control Panel->Fonts' and select 'File->Install New Font...'
Note: You may also see this error may also occur for other corrupt or missing fonts.