Windows 10 version 1507 (Build 10240), the original "Threshold 1" release from July 2015, is no longer officially distributed as a direct ISO by Microsoft for Home or Pro users

May 9, 2017

While mainstream support for Version 1507 ended on , for Home and Pro editions, its lifecycle was extended significantly for specialized users:

Windows 10 professional iso file download guide: * Go to the Microsoft Windows 10 download page. * Download Media Creation Tool. * Microsoft Community Hub

If you connect a 1507 machine to the internet without a firewall whitelist, expect compromise within hours.

The Alternative: The Enterprise 2015 LTSB

For vintage computing hobbyists, creating your own slipstreamed ISO using Microsoft’s official tools is the safest route. For everyone else – forget 1507. Use Windows 10 22H2 (until October 2025) or switch to Windows 11 / Linux for security.