I added in a new website on my local IIS yesterday, IIS 8.5 on Win 8.1.
After I added it IIS hung indefinitely with the loading circle and I ended up having to kill it through Task Manager. That was late last night and I gave in and turned my computer off. This morning none of my sites work, all of them return Not Found. HTTP Error 404. The requested resource is not found..
When I open IIS and try to expand the Sites node underneath my local IIS I get the spinning circle that indicates loading but it never completes.
Is there some way to fix this without losing all of the sites I have set up?
One thing you can try to using a previous configuration, they are stored in
C:\inetpub\history.
Copy the *.config files to C:\Windows\System32\inetsrv\config, you may have to use the one before the last one (CFGHISTORY_000000xxxx), the last one is usually the current one.
If that doesn't help, copy those config backups somewhere else, re-install IIS and then restore a config backup.
来源：https://stackoverflow.com/questions/28351914/iis-sites-node-wont-expand