Well, I logged on today and tried with a lower case "w" and I didn't get the error that windows was giving me but the unlock didn't work. So then I tried with the capital "W" again for the hell of it and it worked, woot!
I don't know if maybe there is a pattern to it? Because in his instructions he tells you lower case "w" and when you read on further it says "W". But anyway, time to go sink a convoy and not have to surface to reload and hunt it down again. Thx to all for trying to help, I appreciate it and thx to Wolfie for this nice add on.

