windows defender is a utensil that the Microsoft added to windows because off be against viruses and spywares
but the it need to be update always but you should connect to internet if you want to do it.
today we want to say you a trick that you can update your defender offline.
for this you should know the Microsoft offline link for windows 32bit and 64bit and type it in your URL browser.
for windows 32bit you should type the address below:
and for windows 64bit you should type the address below:
then you should setup this update links to update your windows defender.