14 DAY TRIAL // The May 2019 Patch Tuesday cycle brought new monthly rollups for Windows 7 and 8.1 devices, along with security-only updates that do not include any non-security fixes.
The Windows 7 monthly rollup is KB4499164, while the security-only update is KB4499175.
As per the official changelog, the Windows 7 update comes with a series of improvements, including patches for the Microarchitectural Data Sampling (MDS) flaw that was recently discovered. You can read more about this flaw in this article.
Additionally, the patch also resolves issues hitting Microsoft Excel when using certain fonts, as well as a bug preventing Visual Studio Simulator from starting.
Windows 7 monthly rollup comes with just a single issue that was there in the April release as well. Microsoft says that installing this update could break down McAfee security products, and the company claims it’s still investigating the bug with the security vendor.
Windows 8.1 monthly rollup
The Windows 8.1 monthly rollup is KB4499151, and it comes alongside security-only update KB4499165.
The same security patch for the MDS security vulnerability is included here, along with fixes for Error 1309 when installing MSI and MSP files on a virtual drive. Microsoft says it has also added uk.gov into the HTTP Strict Transport Security Top Level Domains (HSTS TLD) for its two current browsers, namely Internet Explorer and Microsoft Edge.
This time, there are three different issues in this monthly rollup, but they have previously been acknowledged as part of the April rollout.
There are no reports of failed installs so far, and everything seems to be working correctly on Windows 7 and 8.1. Windows 7 users should also keep in mind that this operating system is in its last year of support, as Microsoft will stop rolling out updates in January 2020.