Windows 10 Version 1507, codenamed "Threshold 1," holds a unique place in computing history as the very first public release of the Windows 10 operating system. Launched on July 29, 2015, it marked the beginning of the "Windows as a Service" era.
. Since it is long out of mainstream support, Microsoft does not provide a direct "updated" ISO for this version on their current download pages. Redmondmag.com
Windows 10 Release Model: Windows 10 was released with a unique model that involves continuous updates, ensuring that the operating system always remains up-to-date. This approach contrasts with the traditional method of releasing a new version every few years.
Windows 10 Version 1507 (Build 10240) is the original 2015 "RTM" release, and Microsoft no longer provides officially updated ISOs for this retired version, except for the Enterprise LTSB 2015 edition, which receives extended support until 2025. To obtain an updated 1507 ISO, users must utilize tools like UUP Dump to pull recent cumulative updates from Microsoft servers or manually slipstream patches into the original ISO using DISM. For instructions on creating updated Windows media, visit the UUP dump website.
This depends entirely on your use case.
Let’s cut through the confusion and look at what 1507 is, why the "updated" ISO exists, and whether you should actually use it.
Microsoft no longer offers Version 1507 for direct download through its standard Media Creation Tool or web portal. Microsoft Learn Windows 10, version 1507 end of servicing for CB and CBB 16 Mar 2020 —
System Requirements