Once you’ve downloaded and successfully installed QuickTime onto your Windows 10 PC, right-click QuickTime from your desktop and then click Properties. If you run into compatibility issue such as freezing or other unknown bugs, you can try to run QuickTime in compatibility mode for Windows 7 or Vista. But it should work fine playing normal videos or musics.
There is no guarantee that things will work perfectly as expected using the said QuickTime version on Windows 10, especially if you are to play some new formatted videos, it probably won’t work.
If you install it on other later versions of Windows such as Windows 10, it may not work with full functionality and may not be able to play some of the latest videos. It has been working perfectly on these OS version.
QuickTime 7 Windows version was last supported on Windows 7 and Vista.