Click the identity tab and see who is the pool assigned to. For the sake of testing, you can select "Predefined" and select local service from the drop down. Restart IIS and see if things work out for you. Http 503 error is generated by the IIS and it hap

Click the identity tab and see who is the pool assigned to. For the sake of testing, you can select "Predefined" and select local service from the drop down. Restart IIS and see if things work out for you. Http 503 error is generated by the IIS and it happens when web server sends 

Jerk off, no such tab. Please delete this crap and stop giving me false hope. There are NO TABS