How to use DISM command-line utility to repair a Windows 10 image

[Windows Central]

Is your Windows 10 PC slowing you down, and the SFC utility is unable to fix the problem? Then use DISM to repair the Windows image to enable SFC to do its job.
Windows 10 includes a nifty command-line utility known as Deployment Image Servicing and Management (DISM). It's fairly a new tool, which Microsoft first introduced with the original release of Windows 8, and now comes installed by default on Windows 10 and Windows 8.1.

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