See what’s using the space – This shows whether the Windows component store (WinSxS) can be cleaned.
DISM /Online /Cleanup-Image /AnalyzeComponentStore
Clean the WinSxS component store – This removes superseded Windows update components.
DISM /Online /Cleanup-Image /StartComponentCleanup
To be more aggressive:
DISM /Online /Cleanup-Image /StartComponentCleanup /ResetBase
⚠️ After /ResetBase, you cannot uninstall currently installed Windows updates.