IISExpress crash upon debug start

Question

When i try to start my ASP.NET application from VS (2015 or 2017) it just crash with no error in output window.

The program '[8464] iisexpress.exe' has exited with code 0 (0x0).

But Windows Event log says this:

The Module name ManagedEngineV4.0_32bit path C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\webengine4.dll returned an error from registration. The data is the error.

I have no more ideas about how to fix this. I've tried to reinstall VS, IIS, even tried to remove .net framework, change IIS settings from 32 to 64bit but no luck so far.

Any chance someone experienced similar error and found the solution? :)

P.S. Extended error log:

• System

  • Provider

  [ Name] IIS Express

  • EventID 2293

  [ Qualifiers] 49152

  Level 2

  Task 0 Keywords 0x80000000000000

  • TimeCreated [ SystemTime] 2017-06-06T20:47:56.693031400Z
  • EventRecordID 7271
  • Channel Application
  • Computer PC
  • Security

• EventData

  ManagedEngineV4.0_32bit
  C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\webengine4.dll
  2BEE0CC0

---

Binary data:

In Words

0000: C00CEE2B

In Bytes

0000: 2B EE 0C C0 +î.À

Answer 1

I know this is an old thread, but this has been killing me today. And since this is pretty much teh top thread on any search for the error, i decided to add this.

taken from here "Unable to launch the IIS Express Web server" error

1. Delete folder IISExpress from "My Documents"
2. Load your project again, it will create IISExpress folder again with updated configuration
3. Check IISExpress folder has sufficient permissions to read-write the configuration file
4. Load project again and Run IISExpress. It should work.

I didn't need to check any permissions or anything, just deleting and reloading the project was enough for IIS to behave itself and i could get back to some debugging fun.

Cheers