How to Free Up Disk Space on Windows 11 (2026)

A nearly full drive slows Windows 11 down, blocks updates, and triggers low-space warnings at the worst moments. The good news is you can usually reclaim a lot of space in a few minutes using built-in tools, no third-party "cleaners" required. The key is knowing which files are safe to remove and how to clean the notoriously bloated WinSxS folder without wrecking your install.

Key takeaways

• Storage Sense and Disk Cleanup are the safest, fastest ways to reclaim space and are built into Windows 11.
• The WinSxS component store often shows 10-30 GB but its real footprint is smaller because Windows uses hard links that File Explorer double-counts.
• Clean WinSxS only with DISM or Disk Cleanup's Windows Update Cleanup, never by deleting files manually.
• Deleting the WinSxS folder by hand can stop your PC from booting or updating.
• Turn on Storage Sense so temporary files and recycle-bin items get cleared automatically going forward.

Which tool reclaims what

Each built-in tool targets different files. Here is what to reach for and roughly what it frees:

Tool	What it clears	Typical reclaim	Risk
Storage Sense	Temp files, recycle bin, cloud cache	1-10 GB	None
Disk Cleanup (admin)	Update leftovers, Windows Update Cleanup	2-15 GB	None
DISM StartComponentCleanup	Superseded WinSxS components	1-8 GB	None when used correctly
Uninstall apps and games	Large unused installs	50-150 GB each	None
Disable hibernation	hiberfil.sys	4-16 GB	Lose fast startup / hibernate

Start with the safe, easy wins

Before touching system folders, clear the obvious clutter. Storage Sense (Settings then System then Storage) shows what is using space and offers cleanup recommendations. It can empty the recycle bin after a set number of days, make synced cloud files online-only, and run automatically when space is low. Disk Cleanup (cleanmgr.exe) is the classic companion tool for clearing temporary files, update leftovers, and caches.

Open Storage settings

Press the Windows key, type Storage settings, and open it. Windows shows a breakdown of what is using your drive, temporary files, apps, system files, and more.

Run cleanup recommendations

Click Cleanup recommendations. Tick temporary files, recycle bin contents, and previous Windows installation files if present, then select Clean up. This alone often frees several gigabytes.

Turn on Storage Sense

Toggle Storage Sense on and open its settings. Configure it to clear temporary files and empty the recycle bin on a schedule so the drive maintains itself.

Run Disk Cleanup as administrator

Press the Windows key, type Disk Cleanup, right-click it, and choose Run as administrator. Select your system drive, then click Clean up system files to reveal extra options like Windows Update Cleanup. Tick the safe categories and confirm.

Cleaning WinSxS the right way

The WinSxS folder (the component store) holds the files Windows needs to add features, uninstall updates, and repair itself. It frequently appears as 10-30 GB, but its reported size is misleading: Windows projects files from WinSxS into the system using NTFS hard links, and File Explorer counts each link as a separate file. The actual disk footprint is smaller than it looks.

That is why you must never delete files inside WinSxS or the folder itself, doing so can severely damage Windows so it will not boot or update. Instead, use the supported cleanup commands:

• DISM StartComponentCleanup. Open Windows Terminal as administrator and run the component cleanup so Windows removes superseded versions of updated components. The exact command is Dism.exe /online /Cleanup-Image /StartComponentCleanup.
• Windows Update Cleanup. Available through Disk Cleanup's system files mode, it removes older, unused versions of components stored in WinSxS.
• Scheduled task. Windows runs a StartComponentCleanup task automatically when the system is idle, so the store self-maintains over time.

If you want to inspect the store before acting, Dism.exe /online /Cleanup-Image /AnalyzeComponentStore reports the actual size and whether cleanup is recommended.

When you still need more space

If the built-in tools are not enough, look for the real space hogs:

• Large personal files. Use Storage settings to find big videos, disk images, and downloads, then move them to an external or cloud drive.
• Old apps and games. Uninstall games you no longer play; modern titles can be 100 GB each. If a stubborn install fails to remove, our guide on Microsoft Store fixes covers related issues.
• System restore and hibernation. Reducing System Restore allocation or disabling hibernation can free several gigabytes, though weigh the trade-offs.
• A failing or full SSD as the root cause. If your drive constantly fills or thrashes, also rule out the issues in our 100% disk usage guide.

Work top to bottom and stop when you have the headroom you need. Most people reclaim plenty with Storage Sense, Disk Cleanup, and a proper DISM pass alone.

What to do right now

For a fast, safe cleanup in the next ten minutes:

• Open Settings, System, Storage and run Cleanup recommendations.
• Toggle Storage Sense on so temp files and the recycle bin clear on a schedule.
• Run Disk Cleanup as administrator and click Clean up system files to enable Windows Update Cleanup.
• In an admin terminal, run Dism.exe /online /Cleanup-Image /StartComponentCleanup.
• Uninstall the biggest games or apps you no longer use; one modern game can free 100 GB.

Frequently asked questions

Is it safe to delete the WinSxS folder?

No. Deleting the WinSxS folder or files inside it can severely damage Windows so it will not boot or update. Clean it only with DISM's StartComponentCleanup or Disk Cleanup's Windows Update Cleanup, which remove superseded files safely.

Why does WinSxS look so large in File Explorer?

Because Windows uses NTFS hard links to project component files into the system, and File Explorer counts each hard link as a separate file. The reported size is inflated; the real disk footprint is smaller. Use Dism.exe /online /Cleanup-Image /AnalyzeComponentStore to see the actual size.

What is the fastest way to free space on Windows 11?

Run Storage Sense cleanup recommendations and Disk Cleanup as administrator. Together they clear temporary files, recycle bin contents, and superseded update files, often freeing several gigabytes in a couple of minutes without any risk.

Should I use a third-party cleaner app?

You generally do not need one. Storage Sense, Disk Cleanup, and DISM cover the safe, effective cleanup that matters. Third-party cleaners add risk and rarely free meaningful space the built-in tools miss.