Windows 11 Low RAM Performance Patch: What’s Actually Real

Your PC feels sluggish with Windows 11. You’ve heard Microsoft is finally fixing it. Is that actually true?

Here’s the fast answer. Yes, this is real. Microsoft has shipped specific updates in 2026 targeting RAM usage and responsiveness, confirmed at the CEO level as an active priority. Two updates matter most right now: KB5083631 and KB5089573. This guide covers exactly what they do, and what’s still just a promise.

Windows 11 Low RAM Performance Patch: KB5083631, The April 2026 Fixes

This optional preview update targets Windows 11 versions 24H2 and 25H2. It fixes three specific, real problems.

Issue Fixed	What It Actually Does
Delivery Optimization memory leak	Stops the background update-sharing service from consuming excess RAM
Boot sequence performance	Improves startup speed
File Explorer white flash	Fixes the dark-mode flash bug when opening This PC or resizing windows

The Delivery Optimization fix matters more than it sounds. This service handles peer-to-peer sharing of Windows updates and Store app downloads in the background. It had a documented habit of leaking memory over time, quietly eating RAM you never approved.

KB5089573: The Low Latency Profile

This update rolled out a feature called the Low Latency Profile, part of a broader effort Microsoft refers to as Windows K2.

Here’s what it does. It boosts your CPU to maximum frequency for 1 to 3 seconds during app launches. That short burst is enough to noticeably speed things up.

App Type	Reported Improvement
Native Microsoft apps (Edge, Outlook)	Roughly 40% faster launches
Start Menu and context menus	Up to 70% faster response
Third-party apps, including most games	Not covered; rely on their own optimizations

That last row matters. If you’re hoping this speeds up your games specifically, it won’t. This feature targets Microsoft’s own native apps and system UI elements.

Installed the Update But Don’t See Changes? Here’s Why

This trips up a lot of people. You install the KB, restart, and nothing feels different.

Microsoft uses something called Controlled Feature Rollout, or CFR. Features get downloaded as part of the update, but they only activate once Microsoft decides your specific system is ready.

That means having the update installed doesn’t guarantee the feature is actually turned on yet. It’s not a failed patch. It’s a gradual rollout, and your system might just not be in the activated group yet.

How to Enable Low Latency Profile On With ViVeTool

If waiting isn’t for you, there’s a real, documented workaround.

ViVeTool is a legitimate, widely used open-source tool. It can manually force-enable Windows feature flags that are otherwise gated behind Controlled Feature Rollout.

The specific command for this feature set:

.\vivetool /enable /id:60716524,61391826,48433719

Run it, then restart your computer.

This is an advanced, unsupported method. It sits outside Microsoft’s normal, tested rollout process. Back up anything important before making system-level changes like this.

Microsoft Tried This Before. It Didn’t Finish.

Worth knowing before you get too excited. This isn’t Microsoft’s first attempt at exactly this goal.

An earlier internal initiative, referred to as the 20/20 project, aimed to cut both RAM usage and install size by 20 percent. If it had succeeded, idle RAM usage would have landed around 4.8GB.

A Microsoft source confirmed directly: they never got to finish it.

That history doesn’t mean the 2026 effort will fail too. But it’s honest context worth having before assuming this is guaranteed to work out completely.

How Much RAM Does Windows 11 Actually Use Right Now?

Real, current numbers, straight from Microsoft.

System RAM	Reported Idle Usage
4GB (minimum, non-Copilot+ PCs)	Official minimum requirement
8GB	Around 6GB used at idle
16GB	Can exceed 10GB used at idle

That 8GB figure is the one that stings. Six gigabytes gone before you’ve even opened an app.

The Bigger 2026 Roadmap

Beyond these two specific updates, Microsoft has laid out broader plans for the year.

Stated goals include lowering Windows’ baseline memory footprint generally, reducing UI and interaction latency, improving multitasking responsiveness, and moving more shared UI infrastructure toward native frameworks like WinUI3.

At Microsoft’s Build 2026 developer conference, a member of Microsoft’s own Windows UI team confirmed ongoing internal testing of WinUI3 memory optimizations. This work sits ahead of an upcoming Start Menu rewrite built on that framework, aimed specifically at helping low-spec PCs.

Setting the Record Straight on WinUI3

Here’s something worth correcting directly. You may have seen a claim that WinUI3 will deliver a 20 percent RAM reduction.

That specific figure isn’t confirmed. Microsoft has not provided any specific percentage for RAM reduction tied to this WinUI3 effort. Treat any confident specific number you see for this particular initiative with real skepticism, since credible reporting doesn’t support it.

There’s also a separate, more loosely reported detail worth a brief mention. Some reporting suggests Microsoft has quietly walked back an earlier 32GB RAM recommendation it had previously given for Windows 11 gaming systems. Take this one with appropriate caution too, since it comes from limited reporting rather than a fully confirmed policy change.

When Will You Actually See This On Your PC?

Understanding Microsoft’s update cadence helps set realistic expectations.

Optional updates, officially called Cumulative Update Preview releases, generally arrive toward the end of each month. These offer early access to new features and non-security fixes.

Patch Tuesday updates land on the second Tuesday of each month. These are mandatory and include security fixes plus features that already passed testing in earlier optional updates.

If you want early access, install optional updates as they arrive. If you’d rather wait for something more tested, Patch Tuesday is where these features eventually become standard.

Frequently Asked Questions

Is there an actual Windows 11 update that fixes high RAM usage?

Yes. KB5083631 fixed a real memory leak in the Delivery Optimization service, among other issues, and KB5089573 introduced the Low Latency Profile feature.

What does the Low Latency Profile feature actually do?

It boosts your CPU to maximum frequency for 1 to 3 seconds during app launches, speeding up native Microsoft apps and system UI elements specifically.

I installed the update but don’t see any changes, why?

Microsoft uses Controlled Feature Rollout, activating features gradually rather than immediately for everyone who installs the update.

What is ViVeTool, and is it safe to use?

It’s a legitimate, widely used open-source tool for manually enabling gated Windows features. It’s an advanced, unsupported method, so back up your data first.

Has Microsoft tried this before, and what happened?

Yes, an earlier internal effort called the 20/20 project aimed for a 20 percent RAM and install size reduction. Microsoft confirmed it was never finished.

How much RAM does Windows 11 actually use right now?

Reportedly around 6GB idle on an 8GB system, and over 10GB idle on a 16GB system, according to Microsoft’s own figures.

Is it true that WinUI3 will reduce RAM usage by 20 percent?

No, that specific figure isn’t confirmed. Microsoft hasn’t provided a specific percentage for the WinUI3 effort.

When will I actually see these improvements on my PC?

Optional updates arrive toward month-end for early access. Patch Tuesday, the second Tuesday of each month, is where tested features become standard.

Quick Reference Summary

Question	Answer
Is this real	Yes, confirmed by Microsoft, including at the CEO level
Key updates	KB5083631 and KB5089573
Does the update guarantee the feature is active	No, due to Controlled Feature Rollout
Advanced enable method	ViVeTool, unsupported
Confirmed WinUI3 RAM reduction percentage	None provided by Microsoft

Also Read:

• How to Link Microsoft Account to Digital License in Windows 11
• How to Change Default Apps for File Types in Windows 11
• How to Manually Update Your Device Drivers in Windows 11