We tend to install a utility application, such as CCleaner, to clean and optimize our desktop or laptop running on Microsoft Windows OS.

Not many of us, however, are aware that Windows can already do the cleaning and optimization in many ways possible.

Cleaning and optimizing Windows will not only speed up your computer but will also save you more storage space.

Try these methods to clean your computer OS without having to download and install any application.

Disk Cleanup

Using Disk Cleanup is similar to cleaning through a utility app. Depending on how large your computer storage is, the process might take some time. This step is recommended when your computer is idle.

  • Open “My Computer” or “File Explorer.”
  • Right-click on the drive you want to clean (e.g., Local Disk C:) and select “Properties.”
  • Click on “Disk Cleanup.”
  • Tick on the checkboxes you wish to delete. Some files are already checked for your convenience. Others may include temporary files and files in your recycle bin.
  • Click “Ok” to confirm.

Using the Run command

This involves deleting the temporary files that are taking up your space all the time. Although this is done manually, this is much faster and preferable for those who don’t like waiting too long.

  • Press the Windows key and R key at the same time to open the Run command.
  • There are three folders you should clean: “temp,” “%temp%,” and “prefetch.” Type one of these at a time, in which a file explorer showing these folders will pop up.
  • Select all of the files in the designated folders by clicking on the “Select all” option and then click “Delete” to clear them all, both of which can be found in the right-click menu. You may do this process by clicking the same options found in the ribbon menu at the top of the folder. You can also use the shortcuts “Ctrl + A” to select all the files, then press “Delete.”
  • Do the above process with the rest of the folders.

Through your Internet browser

You may want to delete several files, but you might just want to clear up your temporary Internet files on your browser. In that case, you can do that by clearing the browsing data automatically at the set time of your choosing.

  • Open your browser (e.g., Google Chrome)
  • Search for “Clear Browsing Data” through the Search bar. If there’s no search bar in your browser settings, navigate the privacy and security settings where you will find the “Clear Browsing Data” option.
  • Delete your browsing history, Cookies, and Cached files and images. These can be cleared automatically in the option, depending on your preference, so you don’t have to do this every time manually.
  • Click on “Clear Data” to confirm the clearing process.


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