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Windows 11 KB5064081 update clears up CPU usage metrics in Task Manager

Windows 11

​​Microsoft has released the KB5064081 preview cumulative update for Windows 11 24H2, which includes thirty-six new features or changes, with many gradually rolling out. These updates include new Recall features and a new way of displaying CPU usage in Task Manager.

The KB5064081 update is part of the company’s optional non-security preview update schedule, which releases updates at the end of each month to test new fixes and features coming to the next month’s Patch Tuesday.

Unlike regular Patch Tuesday cumulative updates, monthly non-security preview updates do not include security updates and are optional.

You can install the KB5064081 update by opening Settings, clicking on Windows Update, and then "Check for Updates.”

Because this is an optional update, you will be asked if you want to install it by clicking the "Download and install" link unless you have the "Get the latest updates as soon as they're they're available" option enabled, which will cause the update to automatically install.

KB5064081 preview update
Source: BleepingComputer

You can also manually download and install the KB5064081 preview update from the Microsoft Update Catalog.

Windows 11 KB5064081 highlights

Once installed, this optional cumulative release will update Windows 11 24H2 systems to build 26100.5074.

The August 2025 preview update features numerous new additions that are gradually rolling out, including an updated method for displaying CPU workload metrics in Task Manager.

For years, Windows Task Manager's Processes tab displayed CPU usage using a "Processor Utility" metric, which could display confusing or incorrect results.

The method ignored the number of cores a processor had, so a single, maxed-out core on a 16-core CPU could show overall usage at 100%. It also compared workload against the chip's base clock speed rather than its actual operating frequency, so when turbo boost pushed cores above their regular speed, usage could spike beyond 100% and then get clipped in the display.

These quirks meant the numbers shown in the Processes tab usually did not match what was displayed in the Performance or Users tabs, or within third-party monitoring tools.

According to WindowsLatest, Microsoft has now standardized CPU reporting throughout Task Manager, with the Processes tab now using the same formula already used in the Performance and Users tabs.

The new CPU load is calculated as:

(Δ Process CPU Time) ÷ (Δ Elapsed Time × Logical Processors)

This updated CPU utilization formula is now rolling out with this update.

For users who prefer the legacy view, Microsoft has added an optional "CPU Utility" column in the Details tab. However, by default, Task Manager will now show consistent CPU metrics across the entire application.

The complete list of changes that are gradually rolling out includes:

The good news is that some fixes or improvements in the KB5058502 update are available immediately:

Microsoft reports two known issues with this release: a bug that causes incorrect CertificateServicesClient (CertEnroll) errors to appear, and lag/stuttering in audio and video performance when using Network Device Interface (NDI) to stream or transfer feeds between PCs.

The company is now rolling out a fix for the CertificateServicesClient (CertEnroll) errors , but it is gradually rolling out over the next four weeks.

The full release notes for KB5064081 can be found in this support bulletin.

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Original Article Published at Bleeping Computer
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