Note: removing the data prevents the downgrade to the earlier version. Windows administrators have two main options to remove the old copy of the Windows operating system. Free up disk space after the upgrade to the WindUpdate While that may not sound like much on systems with plenty of storage, it makes a noticeable difference on systems low on space. Users should expect to free up between 10 and 20 gigabytes of storage space. Windows users who are satisfied with the upgraded version may remove the old version to free up gigabytes of disk storage. Things can go wrong during updates, and automatic restoration safety systems may roll back the system to the old version automatically. Microsoft maintains a list of known issues, but the listing is not comprehensive. Sometimes, upgrading to new versions of Windows may result in issues. Downgrades are available for 30 days after upgrades. Whenever Windows is updated, a copy of the old version of Windows is stored on the device this is done to give administrators an option to restore the old version.

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