Windows 10 Version 1803 (Build 17134.228) Fiddler About: v5.0.20182.28034 for .NET 4.6.1 Built: Mittwoch, 27. Juni 2018 64-bit AMD64, VM: 54,0mb, WS: 105,0mb .NET 4.7.1 WinNT 10.0.17134.0 You've run Progress Telerik Fiddler: 2 times. Running on: dose-10:8888 Listening to: All Adapters Gateway: No Gateway Steps: * I start fiddler * Klick on the WinConfig menu button * Windows UAC dialog opens * I klick on Yes * After a second the Windows 10 stop screen appears ("a critical process died")