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#190
@Maggidon Yes, in some rare cases, usually an audio driver or such, Windows still has a hook into it and won't let go until the Windows.old gets deleted and a clean reboot is made. Then it points to the correct driver in system32. Don't have an example for you, but it has happened. Maybe someone else can give more details.
If the Windows.old folder is 30+ days old, the system will delete it. If it can. Probably why the one you mentioned did get deleted.