@BuZz

Thank you for your quick reply BuZz!
Man I feel so stupid at the end after the 404 error messages it says run apt-get update or --fix-mis
Duh! I was stupid enough to type apt-get update without the sudo command and that didn't work of course.

Now it is downloading the updates and all seems to go well. Thanks again for the quick help.
I really need to get this whole Linux command stuff into my head asap.

@dudleydes

Yeah, you're right. Just simply shut down the Pi once and swap the keyboard with the WiFi dongle and vice versa is the more comfortable way to do it without the need to hurry.