Formerly Google Sketchup now owned by Trimble.
SketchUp is a 3D modeling program designed for architects, civil engineers, filmmakers, game developers, and related professions. Dubbed "3D for the rest of us", SketchUp's unique user interface allows quick and easy 3D model sketching, modification and presentation.
The latest FREE version of Sketchup as of 07/24/2019 is a Basic online/Cloud modeler, you cannot download and install. Any issues you may have would depend on your web browser. It should work with any operating system.
Download older versions
At this site you can click on the appropriate links to download the last two major versions of SketchUp Pro and Make