Good morning, I had different issues on my UNITY installation... I'm at work now and I will give you more informations later if needed. I have Windows 7 64 bits, SP1. First I couldn't install Visual Studio when Installing UNITY 2019. I solved the problem by installing 1 Windows update (I'll give you the number). I also had the error message saying there is an issue witht he script class name / MonoBehaviour. Certainly linked to this, I couldn't add my scripts on objects. It was not a name issue. I installed Unity again but same problem. On that second installation, I notice there was a message asking to install aWindows update (I'll give the number). I installed this Windows update that was advised at the Unity installation and the problem was gone. But... now I can't select any camera, even the one by default when creating a scene, because when I select one, Unity is freezing and I need to restart it. Same thing when I select on the left column or the scene view. What should I do ? The first update I told about was one that had warnings and could bring problems so I tried to uninstall it with one given by Microsoft (I'll give the number) on their site. I seems it didn't work. So I uninstalled it by remiving from the Control Panel. Same camera issue in Unity. I installed this update again. I installed last version of Unity gain : same camera issue. I tried to install the previous one : same... Then went to bed... Anyone had this issue with the selection of cameras that frezzes Unity ? Do you know how to fix it ? Unity 2019 should work with Windows 7 SP1 right ? Since I installed Windows 7 few months ago, I didn't add any other updates except the ones I told you about and one from Net Framework. So only SP1 + those updates. I could probably install KB3125574. Do you think it can be related to Windows updates ?