Did that, got..
"Reading package lists.. done.
Building Dependency Tree...done.
E: couldn't find package x-window"
And from then on it didn;t do anything..
NVM, I'm going to do it again, I had a typo
So I did it correctly, and I get
"Reading package lists.. done.
Building Dependency Tree...done.
x-window-system is already at the newest version
0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded."