VS2010 error: Unable to start debugging on the web server

Question

I get error message \"Unable to start debugging on the web server\" in Visual Studio 2010. I clicked the Help button and followed the related suggestions without success.

Answer 1

I was getting this after a new install of Windows 7 that did not include IIS by default. After installing IIS, the default app pool was created to run under .NET 2.0. Though I was able to set the default App Pool to .net 4 from .net 2, I still got this error. I had to reinstall .net 4 in IIS to get it to work properly. That is, run C:\Windows\Microsoft.NET{FrameworkFolder}\v{FrameworkNumber}\aspnet_regiis -i

Answer 2

It may also be because of some special or illegal format in your config file i will suggest you to check for that first .

In my case i was getting an error because of that when i tried to browse my service from IIS it showed me the real error .

Answer 3

One of the things to check is to make sure if IIS is up and running. Something as simple as that would resolve this issue sometimes.