SharePoint server 2013 central administration become unavailable after installing active directory

I have SharePoint 2013 installed inside windows server 2008 r2 and it was working fine, but after I install Active directory on the windows server I try to aces the SharePoint central administrator but it gave me the following error:-

Service Unavailable HTTP Error 503. The service is unavailable.

So any idead of how i can re-configure the sharePoint , Sql server to use the AD users instead of the old users?

BR