If a registry entry must be created or modified to correctly configure the server, you can edit the entry directly using the registry editor Regedit.exe.
Credentials: Membership in the Administrators group on the local computer.
As a security best practice, log on to your computer using an account that is not in the Administrators group, and then use the Run as command to run IIS Manager as an administrator. At the command prompt, type runas /user:administrative_accountname "mmc %systemroot%\system32\inetsrv\iis.msc".
Do not edit the registry unless you have no alternative. ...