For light 3D modeling on Windows 8.1, try these instead:
: While it can run, users often reported bugs with file associations and the Windows 8 "Charm Bar" interface. How to Download and Install
If you have an active subscription:
: These are the only versions officially certified for Windows 8.1.
⚠️ Even then, you are running an OS with known security vulnerabilities. Never connect this PC to the internet.
If you check all these boxes, proceed with confidence. SolidWorks on Windows 8 remains a capable, stable CAD workstation – just not a modern one.