I have an install that is made in Advanced Installer that works fine in Windows 8 & 10, but fails on Windows 7. Does a Windows 7-client have any requirements for connecting to a SQL Server (2012, on a different machine), that a Windows 8 or 10 machine does not have? Some drivers that does not exist on a clean Windows 7? The application in a Entity Framework-app and uses Framework 4.6.1 if that matters...
[Edit] Based on all the comments below I refrase my question to this: For a Clean, fully updated, Windows 7 to connect to a remote SQL Server (2008+), is there any other requirements/drivers that is needed to be installed other than .Net framework 4.6.1? For Windows 8 & 10 apparently there are no such requirements...
The problem was partly the firewall, partly my network and partly my code. There are no special drivers etc needed to make a EF-application work in Windows 7. Once network, firewall etc was configured correctly, my application worked.