Virtual Warhammer 40k What Do I Do If My Computer Says Memory Is Too Low?

What do I do if my computer says memory is too low? - virtual warhammer 40k

I tryed to play online, Warhammer, unfortunately, "says my memory is too low? I bought this game and today I downloaded. When I finally installed and tryed to play, you quickly jump to a message that says virtual memory is too low, Warhammer will now terminate. To do this, no matter how often I try. What must I do to play the space?