Using unofficial "portable" versions from third-party sources introduces significant risks: Portable Activation - Autodesk Community
While unofficial "portable" versions of AutoCAD 2015 can be found on platforms like Google Drive, it is important to note that --- Autocad 2015 Portable Google Drive
Instead of risking an unofficial download, there are legitimate ways to get AutoCAD 2015 or newer versions: Educational Access: SAVE. Expect some broken features (e.g.
Run the generated portable AutoCAD 2015 executable on a different computer (without administrative rights). Confirm that basic commands work: LINE, TRIM, HATCH, SAVE. Expect some broken features (e.g., plot drivers). --- Autocad 2015 Portable Google Drive
If you need CAD access via Google Drive legally, consider these superior alternatives:
Consider using a with legal portable software like LibreCAD Portable (available via PortableApps.com).