The latest preview build of Windows 10 comes with its own mystery. Buried in the System32 folder of build 14376, alongside 590 other .exe files, is a very recent addition with a name guaranteed to raise eyebrows: UpgradeSubscription.exe.
In the file's properties, it's described as the Windows Upgrade to Subscription Tool, and its date and time stamp corresponds to other administrative tools in the same build. See for yourself:
This mystery file is new in Windows 10 preview build 14376.
The presence of that file is certain to ignite speculation among conspiracy theorists who were convinced in the run-up to the initial release of Windows 10 that the year-long free upgrade offer would turn into some sort of paid subscription.
When I asked Microsoft about this file, I got this response:
The Windows Upgrade to Subscription tool, found in the latest Windows Insider builds, helps to manage certain volume licensing upgrades from Windows 10 Pro Anniversary Update to Windows 10 Enterprise. This binary file is not associated with the free consumer upgrade offering nor is it applicable to consumer Windows editions.