Yes, theWindows 11 June 2026 Patch Tuesday update (KB5094126) ships a “Low Latency Profile” that briefly spikes your CPU to maximum clock speed when you open Start, Search, or launch apps — and on older/budget PCs, the difference is dramatic enough that reviewers are calling it Microsoft’s most impactful single-performance update in years.
After months of preview builds, Microsoft rolled out LLP as part of its June 9 Patch Tuesday release. The feature uses a Controlled Feature Rollout (CFR), meaning not every device gets it immediately — but with a free tool called ViVeTool, you can enable it yourself. Here’s what you need to know: how to check for it, what performance to expect, and which bugs to watch for.
What Is the Low Latency Profile?
The Low Latency Profile is a CPU boosting mechanism built into the Windows 11 scheduler. Normally, when you hit the Start key or launch an application, the CPU scheduler gradually ramps up clock speed based on demand. That brief ramp-up — often just half a second — is exactly what makes older PCs feel sluggish opening simple menus.
LLP bypasses this entirely. When it detects an interactive shell action (opening Start, Search, Action Center, or launching an app), the CPU jumps to its maximum turbo frequency instantly for 1–3 seconds, then drops back to idle. The technical term is “race to sleep”: finish the task at maximum speed, then return to low power sooner.
Microsoft’s Scott Hanselman defended the approach during the preview period by noting that Apple has used similar scheduler behavior in macOS for years — a comparison that immediately sparked debate across forums and tech outlets.
Overview of the KB5094126 update including the Low Latency Profile — by Tech Sudama Lab
How to Check If Your PC Already Has It
Since LLP is delivered via CFR, some devices get it automatically while others don’t. Here’s how to check:
- Install KB5094126 via Windows Update (Settings → Windows Update → Check for updates).
- Open Task Manager and switch to the Performance tab.
- Add the CPU Frequency column if it isn’t visible (right-click on any column header).
- Press the Start key or open the Action Center.
If you see the CPU frequency spike sharply from idle (~1–2 GHz) to maximum turbo for a couple of seconds before dropping back, LLP is active. For more precise monitoring, download HWiNFO (free) and watch the per-core frequency and latency graphs in real-time.
How to Force-Enable Low Latency Profile with ViVeTool
If the feature isn’t active after installing the update, you can enable it manually. Note: ViVeTool is a third-party utility. While widely considered safe, use it at your own risk.
- Download ViVeTool from its GitHub repository.
- Extract the files to
C:\\ViVeTool. - Open Terminal as Administrator.
- Run:
cd C:\\ViVeTool - Execute:
vivetool /enable /id:58989092 - Restart your PC.
To disable LLP if you encounter issues, run vivetool /disable /id:58989092 from the same directory and restart.
Real-World Performance: What You Can Actually Expect
Multiple outlets have tested the feature across a range of hardware. Here’s what the numbers show:
| Test Setup | Result | Source |
|---|---|---|
| 4GB RAM, dual-core VM | Start menu went from “perceptible delay” to “snapping open” | Windows Latest |
| 4.5GHz desktop CPU | CPU jumped from 1.5GHz idle → 4.5GHz turbo instantly on Start key press | Windows Latest |
| Ryzen 7 + RX 9070 XT + 32GB | Noticeable UI improvements — File Explorer and right-click menus faster | SlashGear |
| High-end gaming rig | Noticeable improvement in app launch speeds | Engadget |
| 2016 Lenovo ThinkCentre M700 | Start, Search, and Action Center “feel faster” after forcing LLP | Windows Latest |
The pattern is clear: the weaker your hardware, the bigger the improvement. On high-end gaming PCs the difference is subtle; on budget laptops and aging desktops, it can genuinely feel like a new machine. PCWorld described it as finally making “your sluggish PC feel snappier” — a sentiment echoed across nearly every review.
Demonstration of the Low Latency Profile CPU boost in action — showing the performance difference
Known Bugs and How to Avoid Them
As with any major Windows update, KB5094126 isn’t without issues. Here are the most common problems reported so far:
-
Half-install bug: The update can fail partway through, causing
StartMenuExperienceHost.exeto crash repeatedly. Reinstalling the update typically resolves it. - Service startup delays: On some headless or background-service-heavy PCs, services like Blue Iris, OpenVPN, and Jump Desktop time out during boot due to the increased CPU contention at startup.
- Black screen on login: Some users report a 40-second black screen after the first boot following installation. This appears to be a one-time initialization issue and resolves after a restart.
- UAC dialog lag: User Account Control prompts can take several seconds to populate on affected systems.
If you encounter any of these issues, disabling LLP via ViVeTool (vivetool /disable /id:58989092) is the immediate workaround. Microsoft is expected to address these in a future cumulative update.
The Controversy: “Lazy Fix” or Legitimate Optimization?
When LLP was first spotted in preview builds back in May 2026, critics were quick to call it a brute-force approach — essentially just cranking up CPU speed instead of fixing the underlying scheduler inefficiency. The “race to sleep” philosophy works, the argument goes, but it comes at the cost of brief power consumption spikes.
Microsoft’s counterargument is pragmatic: this exact approach has been used in macOS and iOS for years, and users clearly prefer snappy interfaces over marginal power savings. For older PCs that are already battery-constrained or plugged in, the trade-off is overwhelmingly positive.
Other Notable Features in KB5094126
LLP is the headline, but the June 2026 update packs several other useful features worth knowing about:
- Shared Audio: Stream audio to two Bluetooth LE Audio headphones simultaneously via Quick Settings.
- Multi-App Camera: Multiple apps can access the same webcam at once (e.g., Zoom call while taking a selfie).
- NPU Tracking in Task Manager: The Performance tab now shows NPU utilization, engine, and dedicated/shared memory usage — essential for Copilot+ PCs.
- Faster Windows Search: Results now surface after just 2 typed characters (down from 3+).
- Custom User Folders: Windows Setup finally lets you name your user folder during clean installation.
- 206 security fixes: Including CVE-2026-45657, a kernel RCE vulnerability with a severity score of 9.8.
For a broader look at what this update means in the context of the month’s biggest tech stories, check out the Best of TekMag June 2026 roundup and our weekly headlines recap.
Frequently Asked Questions
Does the Low Latency Profile work on all Windows 11 PCs?
LLP works on any PC running Windows 11 24H2 or 25H2 that installs KB5094126. However, since it’s delivered via Controlled Feature Rollout, not every device activates it automatically. You can force-enable it using ViVeTool with the feature ID 58989092.
Will Low Latency Profile drain my laptop battery faster?
The CPU only spikes to maximum frequency for 1–3 seconds during interactive actions, then returns to idle. Microsoft argues this “race to sleep” approach improves battery life because the CPU finishes tasks faster and spends more time in low-power idle.
Can I disable the Low Latency Profile if I don’t want it?
Yes. If you experience bugs, run vivetool /disable /id:58989092 in an Admin Terminal and restart. You can also uninstall KB5094126 entirely via Windows Update.
For more Windows 11 tips and productivity tools, check out our guide to FlowLauncher, the open-source keystroke launcher transforming Windows productivity.
Featured image: CPU frequency in Windows 11 Task Manager — screenshot via Windows Latest. Used under fair use for editorial purposes.
Originally published on TekMag
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