Hello Eslam Gad
Sometimes this error occurs due to inapplicable KB update and sometimes the old definitions prevent you from updating.
You can try opening Windows Defender and then try updating the KB from within its interface.
In case Windows Defender fails to update, you can:
> Right-click anywhere on the desktop and go to
New >
Shortcut.
> Create a shortcut for the
%SystemRoot%\System32\Cmd.exe /c Cleanmgr /sageset:35 & Cleanmgr /sagerun:35 command.
> Right-click the shortcut and run the created shortcut as administrator.
> After this, right-click the Start button.
> Click
Command Prompt (Administrator) from the context menu.
> Click
Yes on the
User Account Control confirmation box.
> In the opened elevated command window, type
Dism /Online /Cleanup-Image /StartComponentCleanup and press
Enter.
> Try updating the KB this time.
If the issue persists,
this link and
this link may be of some help.
Let me know which of the above solutions work for you.
Cheers!!