If you still operate Windows 7 (e.g., for legacy industrial software), consider air-gapping the machine from the internet. And if activation is truly your barrier, remember that genuine licenses for old systems are now very cheap on secondary markets like authorized refurbishers.

: For older hardware, lightweight Linux distributions (like Linux Mint ) provide a modern, secure, and free alternative to Windows 7.

Microsoft officially provided evaluation versions of Windows 7 Enterprise for IT professionals, which can be run legally in a sandbox environment for temporary testing.