'How to solve "Microsoft Visual Studio (VS)" error "Unable to launch the IIS Express Web server"

PROBLEM

In some cases "Microsoft Visual Studio (VS)" when you use "Microsoft Internet Information Services Express (IIS)" and you have attached web site project to IIS after run Build shown this error message

Unable to launch the IIS Express Web server.

How can I solve it if exception message does not shown nothing more?



Solution 1:[1]

In my case i tried every post I found on net and nothing works, last thing I done is to change option on project right click/ use visual studio web server and all works well now...

Solution 2:[2]

I tried almost everything but it didn't work. Then I restarted my computer. and iis express worked :) I don't know maybe a reboot was needed for what I did.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Nezir
Solution 2 Kadir Demirel