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You are here: Home / Computer Tips / How (and why) to run Windows’ Disk Cleanup tool

How (and why) to run Windows’ Disk Cleanup tool

Posted on September 21, 2026

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Over time Windows PCs can gather a lot of clutter, and all that junk takes up valuable disk space.

And on rare occasions it can cause the Windows installation itself to slow down and become unstable.

As you can see, it’s very important to keep your machine as free of clutter as possible.

Luckily, all recent versions of Windows come with a handy tool called Disk Cleanup that will quickly and easily remove most of the accumulated digital clutter for you. All you have to do is run it. Here’s how: 

1 – Click the Start button, then type the words disk cleanup into the Search box.

2 – Click Disk Cleanup after it pops up in the search results.

3 – Select the C: drive and click OK.

You should now see a box on the screen listing several different categories of files that you can clean up.

4 – Check all the boxes in the list, then click OK.

5 – Click Delete Files to confirm that you really do want to ditch all the junk.

Disk Cleanup will now work its magic. It’ll just take a few seconds.

6 – Repeat the steps above to run Disk Cleanup again, but this time click Clean up system files in step 3 and follow the prompts as you did before.

That’s all there is to it. Your Windows PC should now be clear of most of the junk that was on it.

 

Bonus tip:  Want to learn a lot more about using Windows 11? Check this out.  (#ad)



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