To the surprise of Windows watchers, the latest Windows 7 “security-only” update includes telemetry. The telemetry in question is Microsoft’s “Compatibility Appraiser,” which checks PCs for problems that could prevent upgrading to Windows 10.

As Woody Leonhard points out on Computerworld, this is pretty odd on Microsoft’s part—the telemetry code was previously available and is probably installed on your system already if you use Windows 7. But, it was restricted to the normal “cumulative” update rollups. As Ed Bott explains on ZDNet:

What was surprising about this month’s Security-only update, formally titled the “July 9, 2019—KB4507456 (Security-only update),” is that it bundled the Compatibility Appraiser, KB2952664, which is designed to identify issues that could prevent a Windows 7 PC from updating to Windows 10.