CefSharp.Wpf - App not working on Windows 7 without installing Visual Studios

I have a Wpf Application that uses CEF to show web content in the application. It is working on every system, but Windows 7. There the Application will work until i get to a UserControl where CEF is embedded.

It just crashes when i get to this point and I can't debug, because the Visual Studio Installation fixes my problem.

So I started this morning and tried this:

used Dependency Walker 2
Updated IE
Updated DirectX
Updated .NET Framework
Went through the Output files description table (Redistribution)

I found many ClickOnce Problems (like this or here) - but i don't deploy it like that at the moment. I just want to make it work by copy deployment.

Currently the Installation of VS2015 (only tried this version) fixes my problem - but I don't know what it installs to make it work. Do you know?

If it helps - i get this Problem signature

Problem Event Name: CLR20r3
Problem Signature 01: MyWpfApp.WpfApplication.exe
Problem Signature 02: 1.0.0.0
Problem Signature 03: 592c4983
Problem Signature 04: PresentationFramework
Problem Signature 05: 4.6.81.0
Problem Signature 06: 5584f3d7
Problem Signature 07: 22fd
Problem Signature 08: 0
Problem Signature 09: System.Windows.Markup.XamlParse
OS Version: 6.1.7601.2.1.0.320.65
Locale ID: 1031
Additional Information 1: b516
Additional Information 2: b51634feea5bd8f1418ce636d6fff953
Additional Information 3: f184
Additional Information 4: f184d6de0b91a1a4c60646f94c577d0c

My next step will be - checking what is installed with Visual Studio 2015. My current guess is that there is a missing VC++ Redistributable.

Solution

CefSharp cover this on their FAQ and it is very likely a missing VCRedist.

You can include the redist MSI with your installer if you have one or simply drop the required libraries into your archive for xcopy style deploys