You are enthusiastic your issue is resolved, but, to be honest, and please don't get me wrong, this is absolutely basic Windows knowledge. This is stuff you do and learn by trial and error in your first month after you get your first PC. It sounds as if you never installed programs before. It may be that you had people who did it for you, but you make yourself dependent on this. If you want to avoid this kind of issue in the future, make yourself familiar with what happens when Windows installer performs the installation of an application.
The issue never happened, if you followed the first rule of app installation: don't ever change proposed installation paths, unless you absolutely know that you need to change this and why you need to change this. Whenever you get the option to change something during installation or during configuration, never change any default setting unless you exactly know what this setting does, exactly know what a change will result, and exactly know that you need to change the setting.
This advice is also about random Youtube guides you might stumble upon while looking on how to configure OBS: don't follow their advice. What they tell about configuration usually applies only to the PC of the video creator, but not necessarily to your PC, because your PC has definitely different hardware than theirs.