Unable to start debugging in Visual Studio 2010

Similar to Debugging ASP.NET with IIS but for different version of visual studio, different OS and his fix didn't work.

Before I shut dow开发者_如何学编程n my computer last night everything worked fine. This morning I rebooted and I started getting the error message below when I tried to start debugging my web application:

alt text http://a.imageshack.us/img710/3306/errorhd.png

When I start it without debugging it get a HTTP 503 error.

What would cause this to suddenly break? How do I fix it?

Ok, so it turns out that this was caused because I recently changed my password. To fix I had to:

1. Go into IIS
2. click on Application Pools
3. Right click on my DefaultAppPool and select Advanced Settings
4. Update the password used for my Identity.

Hope this is useful to someone else.