I am trying to install oracle 19c DB but after extraction the setup.exe file isn't executing. I have tried it with admin privileges, still doesn't work.
I had the exact same problem, and after playing a bit with things I figured out that this is all about the folder name in which setup.exe is in.
The solution:
Make sure there are no white-spaces in your folder name (or possible in the path in general, haven't checked that, but it makes sense).
Once you renamed the folder to a white-space-less name, you can just run setup.exe directly from that folder.