If you must use Windows 7 for legacy software (such as older industrial machines), it is best to keep that machine (air-gapped) to prevent security vulnerabilities.
I held my breath and typed:
: In real-world tests, the 64-bit version has been shown to boot in approximately 38 seconds , nearly twice as fast as the 32-bit version on identical hardware. product key windows 7 ultimate 64 bit build 7600 install