Windows 11 Storage Cleanup: Reclaim 10–20 GB Right Now

A Windows 11 storage cleanup is the fastest way to recover 10–20 GB of wasted drive space without spending a penny or risking your data. Whether your C: drive is flashing red or your PC has simply slowed to a crawl, this guide walks you through every safe method — from built-in Windows tools to manual deletion steps — so you can reclaim real space today.

Why Windows 11 Eats So Much Disk Space

Windows 11 is a feature-rich operating system, but that richness comes at a storage cost. Every cumulative update downloads fresh installation files and then leaves the old ones behind as a safety net. On top of that, the OS generates temporary caches, installer logs, and Delivery Optimization files that quietly pile up. Pre-installed apps — including some you will never open — occupy several more gigabytes. Over the course of a year, a typical Windows 11 install can accumulate 15–25 GB of recoverable junk, according to Microsoft’s own guidance on freeing up drive space.

• Windows Update leftovers — old patch files kept for potential rollbacks

• Windows.old folder — a full copy of your previous OS install after an upgrade

• Temp files — browser caches, installer extracts, log files

• Delivery Optimization cache — files pre-downloaded for other devices on your network

• Bloatware — pre-installed apps from Microsoft and PC manufacturers

• Hibernation file (hiberfil.sys) — can occupy 4–8 GB depending on your RAM

Step 1: Run Storage Sense for Quick Windows 11 Disk Cleanup

Storage Sense is Windows 11’s automated cleanup engine and the safest place to start. It targets only files Windows itself flags as safe to delete, so there is no risk of removing something critical.

1. Open Settings → System → Storage.

2. Toggle Storage Sense on, then click the arrow next to it to open detailed settings.

3. Under Run Storage Sense, select During low free disk space or choose a schedule (daily, weekly, monthly).

4. Enable Delete temporary files that my apps aren’t using.

5. Set the Recycle Bin cleanup threshold (e.g., files older than 30 days).

6. Scroll down and click Run Storage Sense now to execute it immediately.

A single pass with Storage Sense typically removes 1–5 GB on an average machine. For deeper results, combine it with the manual steps below.

Step 2: Use Disk Cleanup to Remove Temp Files and Update Leftovers

The classic Disk Cleanup utility still offers one feature Storage Sense does not expose as clearly: Windows Update Cleanup. This targets the old update packages and is often the single biggest win in a Windows 11 disk cleanup session.

1. Press Windows + S, type Disk Cleanup, and open it.

2. Select drive C: and click OK.

3. Click Clean up system files (requires admin rights) — this unlocks the largest categories.

4. Tick Windows Update Cleanup, Temporary Internet Files, Thumbnails, and Recycle Bin.

5. Click OK, then Delete Files to confirm.

Windows Update Cleanup alone can reclaim 3–10 GB depending on how long since your last cleanup. It is completely safe — Windows re-downloads any update file it needs in the future.

Step 3: Delete the Windows.old Folder to Free Up Disk Space

After upgrading from Windows 10 to Windows 11, or after a major feature update, Windows keeps a full backup of the previous installation in a hidden folder called Windows.old. This folder typically consumes 8–15 GB and Windows retains it for only 10 days before auto-deleting it. If you are confident the upgrade went smoothly, remove it earlier:

1. Open Disk Cleanup and click Clean up system files.

2. Tick Previous Windows installation(s).

3. Click OK and confirm.

Do not delete Windows.old if you are still within the rollback window and think you may want to revert — once it is gone, reverting requires a clean reinstall.

Step 4: Clear Temporary Files Manually to Remove Temp Files Fast

Beyond what Disk Cleanup catches, two hidden folders accumulate user-level temporary files that are almost always safe to delete:

• Press Windows + R, type %temp%, and press Enter. Select all files (Ctrl + A) and delete them. Skip any file showing “in use.”

• Press Windows + R again, type temp, and repeat the process for the system-level temp folder.

• Finally, type prefetch in the Run dialog, confirm the UAC prompt, and delete everything inside.

This manual sweep regularly clears an extra 500 MB to 3 GB, especially on machines used for development or frequent software installs.

Step 5: Remove Bloatware With the Windows 11 Storage Cleanup Settings

Pre-installed apps — sometimes called bloatware — are a legitimate storage drain. Removing unused ones is a painless free up disk space win:

1. Go to Settings → Apps → Installed apps.

2. Sort by Size to identify the heaviest offenders.

3. Click the three-dot menu next to any app you do not use and select Uninstall.

Common uninstall candidates include Xbox Game Bar (if you do not game), Microsoft Teams (standalone), Solitaire Collection, and manufacturer-bundled utilities. Each one removed typically frees 300 MB to 2 GB.

Step 6: Turn Off Hibernation to Recover Hidden Gigabytes

If your PC uses a fast SSD and you rely on Sleep rather than Hibernate, the hibernation file (hiberfil.sys) is dead weight. On a machine with 16 GB of RAM, this file alone occupies around 12–13 GB by default.

To disable it, open Command Prompt as Administrator and run:

powercfg /hibernate off

Windows immediately deletes hiberfil.sys and frees that space. You can re-enable hibernation at any time by running powercfg /hibernate on. Note: disabling hibernation removes the Fast Startup feature, so your PC may take a second or two longer to boot.

Step 7: Enable Cleanup Recommendations for Ongoing Windows 11 Disk Cleanup

Windows 11 version 22H2 and later includes a Cleanup Recommendations panel that surfaces large files, rarely used apps, and synced cloud content all in one place. Think of it as a smarter, curated version of Storage Sense.

1. Go to Settings → System → Storage → Cleanup recommendations.

2. Review each category: Temporary files, Large or unused files, Files synced to the cloud, and Unused apps.

3. Tick the items you want to remove and click Clean up.

Running this monthly keeps storage creep from building up between major cleanup sessions.

Bonus: Free Third-Party Tools Worth Considering

Built-in tools handle most situations, but two free third-party utilities are worth knowing:

• Microsoft PC Manager — Microsoft’s own lightweight cleaner (available from the Microsoft Store), excellent for quick one-click temporary file removal.

• BleachBit — open-source and powerful, great for clearing browser caches, application logs, and more. Always review what it plans to delete before confirming.

Avoid “registry cleaners” that promise miraculous speed boosts — they offer negligible real-world gains and carry a risk of breaking system entries.

What to Do After a Windows 11 Storage Cleanup

Once you have reclaimed your space, the most effective reset for an install that still feels sluggish after years of updates is a clean reinstall of Windows — it clears the accumulated clutter these steps can only partly reach, and you will need a valid product key to activate that fresh copy. With Microsoft having ended support for Windows 10 on October 14, 2025, moving to a properly licensed Windows 11 is the sensible next step. At TopKeyShop, you can grab a genuine Windows 11 Home Retail licence or explore our full range in the Windows 11 product category for Home, Pro, and bundle options — all delivered digitally within minutes.

FAQ

Is it safe to delete everything in the Windows Temp folder?

Yes, in almost all cases. The %temp% folder holds files that applications created temporarily during installation or operation. Simply skip any file that throws an “access denied” or “in use” error — those belong to a running process and Windows will clear them on the next restart. Everything else can be deleted without harm.

How often should I run a Windows 11 storage cleanup?

Enabling Storage Sense on a monthly schedule handles routine clutter automatically. For a deeper manual cleanup — deleting update leftovers and temp folders — once every three to six months is usually sufficient for most users. Heavy software testers or developers may benefit from a monthly manual pass.

Will removing Windows Update files break future updates?

No. Windows re-downloads any update package it needs for future installs or repairs. The files stored in Windows Update Cleanup are leftovers from updates already applied — they serve no ongoing purpose and are explicitly flagged as safe to delete by Microsoft’s own Disk Cleanup tool.

How much space can I realistically free up with a full disk cleanup?

On a PC that has never been cleaned and has gone through at least one major Windows 11 feature update, a full cleanup — Storage Sense, Disk Cleanup with system files, manual temp deletion, and Windows.old removal — routinely recovers 10–20 GB. Disabling hibernation on a high-RAM machine can add another 8–12 GB on top of that.

Does uninstalling bloatware speed up Windows 11?

Removing pre-installed apps that run background processes — like some manufacturer utilities or Xbox services — does modestly improve startup time and reduce RAM usage. The performance gain varies by app; uninstalling purely passive apps (games, media apps) mostly just recovers storage rather than raw speed.