Configuration file is not well-formed XML | IIS

This one is a nice, easy one which I thought I’d post.

If you are changing rules or any config in IIS and you’re doing it through applicationhost.config, there’s a chance that you’re going to corrupt the file and get the following error message:

Have no fear!  You can restore this file from a backup which is located in the following location:

C:\inetpub\history

Simply check the date that it was backed up and you can restore it from there.