by Martin Brinkmann on July 11, 2019 in Windows - 42 comments

Microsoft released security updates for all supported operating systems on the July 2019 Patch Day. Windows 7 administrators get to choose between a security-only update or a monthly rollup update. The main difference between the two is that security-only supposedly only contains security related patches while the monthly rollup update may also include non-security changes.

KB4507456, which is this month's security-only update, seems to have included more than just security patches for the various components of the Windows 7 operating system. According to reports, installing the security-only update replaces the notorious KB2952664 ( see ghacks page), the Compatibility update for keeping Windows up-to-date and also making sure that upgrades to Windows 10 work as expected.

With the July 2019-07 Security Only Quality Update KB4507456, Microsoft has slipped this functionality into a security-only patch without any warning, thus adding the “Compatibility Appraiser” and its scheduled tasks (telemetry) to the update. The package details for KB4507456 say it replaces KB2952664 (among other updates).