The Blue Screen door is a virtual hologram; you can walk right through it. But first you have to say the Name Of The Spirit Of Microsoft three times ("Ballmer-Ballmer-Ballmer") and wave an office chair in a threatening manner. The Blue Screen will disappear and you'll be inside.
Just kidding, of course. It doesn't have to be a truly threatening manner; you can smile while doing it.
I tried the 3 words that the dying alien told me to tell the robot AlGORT... “Alt Ctrl Del”