ExtremeTech If You’re Seeing High CPU Usage in Windows 10, Grab This Update By Joel Hruska on May 5, 2021 at 8:51 am This site may earn affiliate commissions from the links on this page. Terms of use. Apparently, a persistent issue with high CPU usage has been making life miserable for some Windows 10 users. Microsoft has released Windows 10 KB5001391, with some quality-of-life fixes for folks affected by random spikes of high CPU consumption with nothing in particular behind them. KB5001391 includes a number of low-level fixes we won’t address here, but there are a few bigger-picture items to call out. You can now set a custom time limit before a Windows Mixed Reality headset falls asleep, and Microsoft has fixed problems with media playback on hybrid devices running dGPUs on iGPU-powered displays. Other included improvements include a now-fixed deadlock in NTFS — a deadlock is when two applications running simultaneously each prevent the other from accessing critical resources, thereby ensuring that neither application can function — and multiple unspecified problem resolutions in the Windows Server Storage Migration Service.