NSIS Installer Win 8 and 10

I am using an NSIS installer to install a C# application.

Upon installation on W8 and 10, the application starts up and then is killed by probably the OS.

However, when I use InstallShield, the installation works smoothly.

During the Installation in w8 and 10, Windows says the application needs .Net Framework 3.5 and then purports to download it. However, I dont see the application in the Control Panel and like i stated when I install with InstallShield I dont have that problem.

Please help

Are you starting the app from the installer with ExecShell or just the startmenu? I don't really see why this would have anything to do with NSIS...