Updated November 2026 · 6 min read

Windows 11 Memory Leak: How to Confirm It and What to Do

"Windows 11 has a memory leak" is a common diagnosis, but most high-memory situations are not leaks. A leak has a specific signature: one process keeps taking memory and never gives it back. Here is how to confirm it before you reinstall Windows or buy a "cleaner".

What a real leak looks like

One process grows steadily over hours (e.g. 300 MB → 3 GB) and does not drop when idle.
Restarting that app resets the number; the machine feels fine afterwards.
The total "Committed" memory climbs even with no new apps open.

Normal caching looks different: Windows fills spare RAM with cached data, so a high "In use" number can coexist with plenty of available memory. That is by design, not a leak.

How to confirm it in Task Manager

Press Ctrl+Shift+Esc → Performance → Memory. Note "Available" and "Committed".
Open Details, sort by Memory (active private working set).
Write down the top three processes. Wait 30–60 minutes of normal use and check again.
A process that only moves up, never down, is the suspect.

The Processes tab groups apps and hides the real per-process number. Use Details.

Common culprits

Browsers with many tabs or a misbehaving extension (Chrome's own Task Manager: Shift+Esc).
Chat and sync apps that keep every conversation or file index in memory.
Game launchers and vendor utilities that never release textures or logs.
Drivers (GPU/network) — the leak appears as non-paged pool growth, not an app.

What actually fixes a leak

Update the app — most leaks are fixed in later versions.
Restart the app (not the whole PC) when it grows too large.
Remove or update the extension/driver causing it.
Check Windows Update for driver and cumulative updates.

Memory cleaners do not fix leaks. They can move idle pages out of RAM temporarily, but the leaking process will keep allocating. Use them for pressure relief, not as a repair.

When it is not a leak

If "Available" stays above 1–2 GB and the disk is not pegged at 100%, the machine is probably fine. High usage with low available memory and constant paging is the real problem — and that may simply mean you need more RAM. See Do You Need More RAM?

If you just need to keep working

When you cannot restart the leaking app right now, releasing its idle memory pages buys time without closing it. MemoryCleaner lists every process by memory, lets you select one and release idle pages in a click. The app keeps running; this is not "End task". It is 2.5 MB, has no ads or bundles, and has a 30-day trial.

Try it before you buy — 30 days, full features, $20 one-time afterwards.

Download MemoryCleaner

FAQ

Does Windows 11 itself leak memory?

Some builds have had driver-related leaks that were fixed in updates. If the growth continues after a full update and reboot, it is more likely an app or driver on your machine.

Does restarting fix a leak?

It clears the symptom, not the cause. If you need to restart daily, find the process that grows and update or replace it.

Can a memory cleaner stop a leak?

No. It can free idle pages temporarily; the leaking app will keep allocating memory.