Microsoft’s Windows 11 Preview Update KB5079391, Released on March 26, adds support for the above display refresh rates 1,000 Hz, Internal documentation confirms that the limit extends to 5,000 Hz. The update was removed by Microsoft on March 27 after some installation issues were found. The listed fixes 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 busterswhich was the first to identify support for 5,000Hz refresh rates, site founder Mark Rehzon helped convince Microsoft to increase the maximum refresh rate to that level. Microsoft’s update notes only mention support “Refresh rates above 1,000 Hz” 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 performance-related changes: it improves auto-rotation and HDR reliability, and increases power efficiency for monitors connected via USB 4.
The update also introduces detailed image description When using Narrator for CoPilot and CoPilot+ PC. Additionally, the design of the dialog box in the Account Settings menu has been adjusted in the Other section.
Why Windows 11 now supports refresh rates up to 5,000Hz?
At CES 2026, Acer, AOC and Philips each unveiled gaming monitors 1,000 Hz Refresh rates that run at HD (720p) resolution. Blur Busters reports that several manufacturers are planning to offer it 2,000 Hz Display panels by 2030. this shows that 5,000 hertz The purpose of the limitation in Windows 11 is to leave room for hardware advancements in the coming years.
Previous versions of Windows did not support refresh rates higher than 1,000Hz. Future updates to the operating system will be required to support these new displays.
KB5079391 installation issues and future rollout
Microsoft pulled KB5079391 Just one day after release, on March 27, due to unknown installation failures. The company has not announced when the revised version will be available. Users who did not install the update before the recall will receive the changes included when Microsoft re-releases it.
