Neural Processing Units have been one of the most heavily marketed additions to modern laptops, particularly as “AI PCs” gained momentum over the past two years. In theory, NPUs are designed to handle local AI workloads more efficiently than CPUs or GPUs, reducing power consumption while enabling on-device features. In practice, however, most users rarely interact with NPU-powered features at all, relying instead on cloud-based AI tools that make the dedicated hardware feel largely unused—and potentially wasteful.
That concern appears to be partially justified. Microsoft has acknowledged an issue in Windows 11 where NPUs could remain active even when laptops were idle, leading to unnecessary battery drain. According to the official patch notes for Windows 11 update KB5074109, which applies to both version 24H2 and the upcoming 25H2, this behavior has now been corrected. The fix was rolled out as part of the most recent Patch Tuesday update, with Microsoft stating that NPUs should no longer stay powered on during idle periods.
Beyond the NPU-related fix, the update also includes a collection of smaller improvements and maintenance changes. These include routine bug fixes, updated drivers, refreshed Secure Boot certificates, and an updated version of the WinSqlite3.dll system file. While none of these changes are headline-grabbing on their own, together they contribute to improved system stability and security.
For most users, the update should install automatically through Windows Update. Those curious about the technical details can find the complete changelog on Microsoft’s support site, but the most tangible benefit may simply be improved battery life on laptops equipped with NPUs—especially for users who rarely take advantage of local AI features.
