Ok it looks like i may be better off using the manual ArcGIS Enterprise installation. I already did it once, and it looks like ArcGIS Builder is not properly installing, i keep getting this:
"The system cannot find the file specified.
File: c:\<extracted enterprise builder folder>\SetupFiles\Portal\SetupFiles\Documentation\install_guides\portal\GUID-0E8C735C-9B9E-45CB-B5EB-50C9209F4533-web.png."
Also:
Had to uninstall Bitdefender antivirus (since even disabling it was catching false act4 virus and not working), had to close Malwarebytes, and disable windows bitdefender. The CCleaner, and extract iso into c:\ again. And the path was less than the path size limits so i think this wasn't any problem.
So i'm going to do it manually. Also it took me a while to master manual installation but it pays off since you have more control and understand what's going on.
Any suggestions are welcome, i will conclusion this thread soon if no replies, and also mark Dan's answer as helpful. Although would be nice to get builder working, it may be due to a specific software bug or conflict with antivirus which left somekind of footprint even uninstalled avoiding the software to be installed accordingly. In other versions it may get fixed, although main goal here is to get Enterprise working hence the manual install.