Warning: Windows 10 version 1507 (the original 2015 release) is obsolete and no longer supported with security updates. Installing or running unsupported Windows on machines that connect to the internet increases security risk. Use this only for isolated testing, legacy software compatibility, or offline environments.
When Microsoft released Windows 10 on July 29, 2015, it marked a radical departure from the company’s previous strategy. Version 1507 (build 10240) was not just another operating system update; it was the foundation of the "Windows as a Service" (WaaS) model. Nearly a decade later, enthusiasts, enterprise IT managers, and vintage PC collectors still search for the elusive