Windows 10 Upgrade Guide

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Disk Cleanup

Once you have experienced Windows 10, and confident that your personal files, settings and applications have transferred safely through the upgrade process, a final optional step is to cleanup the files discarded from the previous Windows installation.

If you clean up the previous Windows installation or temporary installation files, the recovery option to go back to your previous version of Windows, available only for a month after you upgrade to Windows 10, will no longer be available.
  1. From the Windows 10 Start Menu, select File Explorer. A File Explorer window will be displayed.
    File Explorer: Local Disk (C:)

    File Explorer: Local Disk (C:)

  2. Select This PC, right-click on Local Disk (C:) and then select Properties from the context menu. The Local Disk (C:) Properties window will be displayed.
    Local Disk (C:) Properties

    Local Disk (C:) Properties

  3. Click Disk Cleanup. The Calculating window will be displayed.
    Disk Cleanup: Calculating...

    Disk Cleanup: Calculating…

    Once Disk Cleanup has finished calculating how much space you will be able to free on (C:), the Disk Cleanup for (C:) window will be displayed.

    Disk Cleanup for (C:)

    Disk Cleanup for (C:)

  4. Click Clean up system files. The Calculating window will be displayed.
    Disk Cleanup: Calculating...

    Disk Cleanup: Calculating…

    Once Disk Cleanup has finished calculating how much space you will be able to free on (C:), the Disk Cleanup for (C:) window will be displayed.

    Disk Cleanup for (C:)

    Disk Cleanup for (C:)

  5. From the list of Files to delete, tick the following items.
     

    Windows upgrade log files Windows upgrade log files contain information that can help identify and troubleshoot problems that occur during Windows installation, upgrade, or servicing. Deleting these files can make it difficult to troubleshoot installation issues.
    Previous Windows installation(s) Files from a previous Windows installation. Files and folders that may conflict with the installation of Windows have been moved to folders name Windows.old. You can access data from the previous Windows installations in this folder.
    Temporary Windows installation files Installation files used by Windows setup. These files are left over from the installation process and can be safely deleted.
  6. Click OK. The Are you sure you want to permanently delete these files? window will be displayed.
    Are you sure you want to permanently delete these files?

    Are you sure you want to permanently delete these files?

  7. Click Delete Files. The Are you sure that you want to do this? window will be displayed.
    Are you sure that you want to do this?

    Are you sure that you want to do this?

  8. Click Yes. The Cleaning up drive (C:) window will be displayed.
    Disk Cleanup: Cleaning up drive...

    Disk Cleanup: Cleaning up drive…

    Once Disk Cleanup has finished Cleaning up drive (C:), the window will automatically close. The Local Disk (C:) Properties window will be updated to reflect the new amount of Used and Free space.

    Local Disk (C:) Properties

    Local Disk (C:) Properties

  9. Click OK to close the Local Disk (C:) Properties window.

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3 comments

    1. Hi Paul!

      Thanks for your comment. I’ll try to clarify this better in both my Upgrade and Install guides.

      There is actually a way of doing a clean install and still qualify for the free upgrade, but only when upgrading from media (i.e. not from the Get Windows 10 app). At the very last screen Ready to install before you initiate the Windows 10 upgrade, there is a Change what to keep link. If you click this link, and then select Nothing, you end up with an activated clean installation rather than an upgrade.

      Windows 10 Setup: Change what to keep

      I’m not sure many people know about this!?

      Kind Regards,
      Chris.

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