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Ultimate Guide to Disk Cleanup: Free Up Space and Boost Performance


Is your Windows 11 PC running slower than usual? One common culprit might be cluttered disk space filled with unnecessary files. Fortunately, Windows 11 includes a handy tool called Disk Cleanup that helps you clear out unwanted files and free up valuable storage. In this guide, we’ll walk you through how to use Disk Cleanup step-by-step—no tech jargon, just straightforward advice!


What is Disk Cleanup in Windows 11?

Disk Cleanup is a built-in utility that scans your computer for temporary files, system cache, recycle bin contents, and other files safe to delete. This helps optimize your system’s storage and performance without risking your important personal data.


How to Open Disk Cleanup on Windows 11

There are several ways to launch Disk Cleanup—here’s the easiest:

  1. Use Search

    • Click the Start button or press Windows key on your keyboard.
    • Type Disk Cleanup in the search bar.
    • Select the Disk Cleanup app from the search results.

  2. Run Dialog

    • Press Windows key + R.
    • Type cleanmgr and hit Enter.


Step-by-Step Guide to Use Disk Cleanup in Windows 11

  1. Select the Drive to Clean
    When the Disk Cleanup window opens, it will ask you to select the drive you want to clean (usually your C: drive). Select the correct drive and click OK.

  2. Scanning for Files
    Disk Cleanup will analyze the selected drive and calculate how much space can be freed. This usually takes a minute or two depending on your system.

  3. Choose Files to Delete
    You’ll see a list of file types such as:

    • Temporary Internet Files
    • Recycle Bin
    • Temporary files
    • Thumbnails

    Review these options and check the boxes next to the files you want to delete. Don’t worry—Disk Cleanup only shows files safe to delete!

  4. Clean Up System Files (Optional but Recommended)
    For a more thorough clean, click the Clean up system files button. This allows you to remove:

    • Previous Windows installations
    • Windows Update Cleanup
    • Device driver packages

    Select the drive again when prompted and then check the additional file types to delete.

  5. Confirm and Delete
    Once you have selected all files to remove, click OK, then confirm by clicking Delete Files. Disk Cleanup will begin deleting the selected files.

  6. Done!
    When the process finishes, your system will have more free space. You might even notice your PC running a bit faster.


Tips for Effective Disk Cleanup

  • Run Disk Cleanup regularly: Make it a habit to free up space every few weeks.
  • Empty Recycle Bin manually if needed: Some files may remain in the Recycle Bin even after cleanup.
  • Use Storage Sense: Windows 11 also has Storage Sense that can automatically delete unnecessary files—consider enabling it for hassle-free maintenance.


Why Use Disk Cleanup?

Freeing up disk space can help your Windows 11 PC:

  • Run more efficiently
  • Speed up system boot times
  • Prevent errors due to low storage
  • Create room for new apps, files, and updates


Final Thoughts

Disk Cleanup is a simple yet powerful tool built into Windows 11. It’s perfect for anyone who wants to optimize their PC’s storage without downloading third-party software. Next time your computer feels bogged down, give Disk Cleanup a try—it might be just the boost your system needs.


If you found this guide helpful, don’t forget to share it with friends and family who might want to speed up their Windows 11 computers too! Need more Windows 11 tips? Explore our blog for easy hacks and tutorials.

Updated on June 3, 2025
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