Verify that the String (Default) value of the HKEY_CLASSES_ROOT .html key is htmlfile

  1. Select Start > Run. Image Placeholder

  2. In the Open box, type regedit, and then select OK.Image Placeholder

  3. Locate, and then select the registry subkey: HKEY_CLASSES_ROOT \.html.Image Placeholder

  4. Make sure that the value of the String (Default)  is "htmlfile". If it's not htmlfile, right-click (Default), select Modify, input htmlfile in the Value data box, and then select OK.Image PlaceholderImage Placeholder

  5. Exit Registry Editor.