Running the QuickTime installer in compatibility mode may solve this problem. Try this method and check if you can complete the installation process. Open your Download folder and locate the QuickTimeInstaller. Right-click on it and select Properties.
Can QuickTime install on Windows 10 2021?
Apple QuickTime is not officially available for Windows 10, as Apple stopped support for Windows back in January 2016. While QuickTime is not supported officially anymore, it is still possible to install QuickTime on devices running Windows 10 or older versions of Windows.
Why can’t I install QuickTime on Windows 10?
If you are using Windows 10 and see a warning that it’s not possible to install QuickTime on your system, please try QuickTime 7.7.6 from Apple instead. You may also need to right-click the installer and choose to run it in Compatibility mode for Windows 7.