Unable to connect to web server

Question

I know that this problem has been discussed here a lot of times before but believe me I've tried every single one of them and I still have this issue.

As a last resort before pulling my hair I decided to ask the question again and explain what I have tried so far:

1. The first thing I have tried is to to remove .vs folder from the project as I read about it somewhere here.
2. I have deleted the .vs folder started Visual Studio as administrator and changed the port number.
3. I deleted IISExpress folder from [Documents]/IISExpress
4. At this point I was pretty pissed off so I uninstalled and reinstalled Visual Studio 2017 Enterprise.
5. I uninstalled and reinstalled IISExpress 10
6. I uninstalled IISExpress 10 and installed IISExpress 8
7. I put 127.0.0.1 localhost to my host file (It was not there before)

Nothing here did solved my problem so at this point I am pretty desperate and open to any kind of suggestions.

I am using Windows 10 with Visual Studio 2017 and cannot run any of the projects neither debug nor without debug mode. I am getting the same error all the time - Unable to connect to web server.

Any help is appreciated. Thank you in advance.