@burnout426 @donq @blackbird71 @leocg Solved Version 2!!! I tried to install Opera to a brand new Laptop (Windows 10) and for some reason it did the Exact same thing! The pop up messenge ''This opera installer works only on Windows 7...'', windows 7 icons (-,❒,X) etc.
What I did is I Installed an older version, the ''69.0.3686.95'' worked for me (the others caused the same problems for some reason) https://get.geo.opera.com/pub/opera/desktop/69.0.3686.95/ and it worked Perfectly! Then I went to settings and all I had to do was to update to the latest version.
I have no idea why Opera does this. I really don't and my only geuss is that something has to do with Windows 10? Maybe idk.