: A cloud-based solution that allows you to edit and view drawings directly in your web browser—no installation required. Access it at the AutoCAD Web Portal.

Autodesk offers a fully functional 30-day trial of AutoCAD. You can download AutoCAD 2020 trial (if still available via archive) or a current version — though current versions don't support Win7. For Win7, search Autodesk's "Previous versions" section.

No. Same reasons as full AutoCAD.

For a safe and functional experience on Windows 7 (64-bit), consider these legitimate and free alternatives. Official Free Options from Autodesk Download AutoCAD | AutoCAD Free Trial - Autodesk

The search for "descargar AutoCAD portable para windows 7 64 bits 1 link free" is understandable — software is expensive, and older hardware feels limiting. But today, you have alternatives: