You did not post the full Command Prompt window, so I am not sure if you are starting the Command Prompt as Admin?
Go to Search and type CMD, Right click the CMD results and Run as Administrator. In the Elevated Command Prompt, copy and paste or type
DISM /Online /CLEANUP-IMAGE /CheckHealth Press Enter,. Then type
DISM /Online /CLEANUP-IMAGE /RestoreHealth and press Enter
After that completes, type
SFC /scannow. and press Enter
If everything fails, Reset the PC Keeping Files
Go to Settings/System/Recovery/Reset this PC/Reset PC/ Keep My Files