Microsoft’s Windows 11 preview update KB5079391, released on March 26, adds support for display refresh rates above 1,000Hz, with internal documentation confirming the limit extends to 5,000Hz. The update was removed by Microsoft on March 27 after some installation issues were found. The improvements listed are expected to be available to users in a future release.
The update applies to Windows 11 versions 25H2, 24H2, and 26H1.
According to a post by Blur Busters, which was the first to identify support for 5,000Hz refresh rates, the site’s founder Mark Rehjon helped convince Microsoft to raise the maximum refresh rate to that level. Microsoft’s update notes simply mention support for “refresh rates above 1,000Hz” without specifying an upper limit.
Display And UI Changes In Windows 11 Update KB5079391
In addition to supporting higher refresh rates, the update brings several other changes related to display performance: It improves auto-rotation and HDR reliability, and enhances power efficiency for monitors connected via USB4
The update also introduces detailed image descriptions for Copilot and Copilot+ PCs when using Narrator. Additionally, the design of dialog boxes in the Accounts settings menu has been adjusted in the Other section.
Why Windows 11 Now Supports Up To 5,000Hz Refresh Rates
At CES 2026, Acer, AOC and Philips each revealed gaming monitors with 1,000Hz refresh rates that run at HD (720p) resolution. Blur Busters reports that several manufacturers plan to introduce 2,000Hz display panels by 2030. This suggests that the 5,000Hz limit in Windows 11 is meant to leave room for hardware advancements in the coming years.
Previous versions of Windows did not support refresh rates higher than 1,000Hz. Supporting these newer displays would require a future update to the operating system.
KB5079391 Installation Issues And Future Rollout
Microsoft pulled KB5079391 on March 27, just one day after its release, due to undisclosed installation failures. The company has not announced when a revised version will be available. Users who did not install the update before it was withdrawn will receive the included changes when Microsoft reissues it.
