
I gave my PC a new Windows installation and run into the following error:
Unable to start process C:\Program Files\dotnet\dotnet.exe. The web server request failed with status code 500, Internal Server Error. The full response has been written to C:\Users\Ben\AppData\Local\Temp\HttpFailure.html.
It took my hours but the fix was very easy:
- I uninstalled IIS Express via Windows’ Programs and Features
- I re-installed IIS Express 10 with the Web Platform Installer.
Error gone.
Related articles

Feb 20, 2026 · 9 min read
.NET 11 Preview 1 Is Here: What's New and What to Expect
The .NET team just released the first preview of .NET 11 and there is already a lot to talk about. While this is an early preview - not a …

Jan 02, 2026 · 4 min read
Build a Custom FeatureGate Attribute in ASP.NET Core with C#
Feature management is a key technique in modern web applications, allowing you to enable or disable features dynamically without redeploying …

Nov 28, 2025 · 5 min read
Custom IFeatureDefinitionProvider: Feature Flags from Tests and Databases
Feature flags are a great way to ship safely, run experiments and keep production changes reversible. In .NET, the de-facto standard is …
Let's Work Together
Looking for an experienced Platform Architect or Engineer for your next project? Whether it's cloud migration, platform modernization or building new solutions from scratch - I'm here to help you succeed.

Comments