grant IIS APPPOOL wrecked my SQL Server windows authentication

Question

I am pretty sure that following a quick hack to get around a projects permissions with using icacls <path_to_site> /grant "IIS APPPOOL\\<app_pool_name>"(CI)(OI)(M)

I ran

 icacls C:\inetpub\wwwroot\mysite\ /grant "IIS APPPOOL\DEFAULTAPPPOOL":(CI)(OI)(M)

Now I cannot connect to sql server with windows authentication!

Yes, I was not thinking, but "whatever" now I want to revert this and NOT have this grant, so I was reading and reading.. and not having too much fun.

1. How can I revert to the default ? OR
2. Is it easier to just uninstall /reinstall IIS ( local machine, nothing in IIS except 1 website which will get re-created

Answer 1

Repair did not work with sql server 2014.

I installed sql server 2012 and that worked.

No time to troubleshoot it any longer.