Windows 7 - Preview other file types as text in Preview Pane

On top of using PreviewConfig, you will also have to add entries into the registry to get it working on Windows 7.

• Open the registry editor (regedit in the start menu search) and navigate to computer\HKEY_CLASSES_ROOT\.FILE_EXT, where FILE_EXT is the extension you want to add, such as .nfo

  

• Make 2 new string values (REG_SZ) under the file extension's key, Content Type and PerceivedType

  

• Set the value of Content Type to text/plain and PerceivedType to text.

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I just went to RegEdit> HKEY_LOCAL_MACHINE > SOFTWARE > Classes

Found .log

Added a new String Value with Value Name PerceivedType and Value Data text.

Started working straight away.

As of June 2010, PreviewConfig will handle Windows 7 file preview duties without the need for any manual registry editing.