Cannot access localhost of another machine properly

for a web-project i'm working locally on a windows machine.

When accessing the site from my phone or macbook (they are in the same network) the page gets displayed but all the resources like images and styles can't be loaded - The browser says: ERR_NAME_NOT_RESOLVED

On the windows computer i am not the administrator - when i try to install an app for example i have to enter the password i don't have.

Is this maybe the problem? Can someone help me out there?

thaanks - moesphemie