Cant get full access to windows 10 when screen is off

Hi

I cant get full acces on my computers if thay dont have a sreen coneckted or if the screen is of.

for exempel, icant start settings in windows nor controll network setting, hadel handbrake ripps and so on. if the screen is on its no problem.  The problem is that multible of my computers akt as servers and dosent have a screen, How can i get around this? 

//Regards