HTTP Error 500 (Internal Server Error)?

Hi all,

I am trying to follow a tutorial on creating custom workflow task forms. For this, I am creating a Web Site with ASP .NET Page and am deploying this website to http://localhost/_layouts/folder

Whenever I am trying to deploy (even without Debugging), when the browser comes up and tries to navigate to say http://localhost/_layouts/folder/customform.aspx, it gives me a HTTP Error 500 (Internal Server Error). Even if I try to navigate to just the http://localhost/_layouts/folder I get the same error.

Here is my dev environment:

- Windows 8 Pro (I know I know, but it seems to be working fine)

- SharePoint 2010 Foundation

- Visual Studio 2010 Pro

- IIS 8

Its very hard to debug as I don't know what is causing since the error is vague.

Please help! Thanks!