The following registry entries must all be changed in order to set Internet Explorer as the default browser and pass the ‘Would you like to set Internet Explorer as default browser’ popup.
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\http\UserChoice]
“Progid”=”IE.HTTP”
[HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\https\UserChoice]
“Progid”=”IE.HTTPS”
[HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\ftp\UserChoice]
“Progid”=”IE.FTP”
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.htm\UserChoice]
“Progid”=”IE.AssocFile.HTM”
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.html\UserChoice]
“Progid”=”IE.AssocFile.HTM”
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mht\UserChoice]
“Progid”=”IE.AssocFile.MHT”
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mhtml\UserChoice]
“Progid”=”IE.AssocFile.MHT”
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.partial\UserChoice]
“Progid”=”IE.AssocFile.PARTIAL”
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.svg\UserChoice]
“Progid”=”IE.AssocFile.SVG”
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.url\UserChoice]
“Progid”=”IE.AssocFile.URL”
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.website\UserChoice]
“Progid”=”IE.AssocFile.WEBSITE”
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xht\UserChoice]
“Progid”=”IE.AssocFile.XHT”
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xhtml\UserChoice]
“Progid”=”IE.AssocFile.XHT”
[HKEY_CURRENT_USER\Software\Clients\StartMenuInternet]
@=”IEXPLORE.EXE”
[HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\Associations\MIMEAssociations\text/html\UserChoice]
“Progid”=”IE.text/html”
[HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\Associations\MIMEAssociations\message/rfc822\UserChoice]
“Progid”=”IE.message/rfc822”
