If you need CAD on an old PC without installation, use or DWG FastView Portable from official sources. They are free, legal, and will not infect your machine.
Uptodown primarily hosts the installer for official versions. If you are specifically looking for a version compatible with Windows 7, you must use an older release such as AutoCAD 2020 or earlier. Design Master Software Download Page : You can access the general AutoCAD Windows download on Uptodown Version History If you need CAD on an old PC
For a user requiring AutoCAD on a Windows 7 machine or looking for a lightweight solution: If you are specifically looking for a version
are available, but older versions compatible with Windows 7 (like AutoCAD 2015 or 2016) may be listed in the Uptodown CAD collection : It is a paid tool, but Uptodown often provides the 7-day free trial Risks of "Portable" Unofficial Versions If you need CAD on an old PC