6

Why can I not open the applicationhost.config file on 64-bit Windows?

  • 1
    Are you receiving an error message? By default, to edit applicationHost.config, you need to be running your editor of choice (ie Notepad) as administrator since it is within System directory. – Chris Anton Sep 29 '11 at 20:59
6

Paraphrased from icelava.net forums:

Under x64 Windows certain paths are designated as 64-bit paths, and a 32-bit process, like Visual Studio, is being redirected by Windows to the 32-bit path at C:\windows\SysWOW64 whenever C:\windows\system32 is referenced. The 32-bit process thinks it is looking at C:\windows\system32\inetsrv\config when it has been given C:\windows\SysWOW64\inetsrv\config; which indeed contain none of those configuration files we are after.

To solve (credit to Robert McMurray):

Open a 64-bit command prompt and execute the following commands:

cd /d "%systemdrive%\windows\syswow64\inetsrv"

move config configx86

MKLINK /d Config "%systemdrive%\windows\system32\inetsrv\Config"

It should report

symbolic link created for Config <<===>> C:\windows\system32\inetsrv\Config

This effectively renames the 32-bit config directory so a symbolic link of that name can take its place to redirect back to the 64-bit path which we are really interested in.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.