Progid : IE.AssocFile.HTM Hash : XXXXXXXXXXXĬomputerHKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionExplorerFileExts.htmlUserChoiceĬomputerHKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionExplorerFileExts.xhtUserChoice Following are the registry entries.ĬomputerHKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionExplorerFileExts.htmUserChoice Can any body help me to possibly create this hash for every computer or with some API provided by Microsoft to set default browser ('SetAppAsDefaultAll' does not work). Windows 8 too has few registry settings to be changed mentioned below, but along with this it also stores a unique Hash for every computer. With Windows 8 it's not that easy (I'm yet to figure it out how). We all have been easily able to do this prior to Windows 8 (in XP/VISTA/WIN7) with few changes in Registry and it was done.