
That was indeed what I had not done yet.
I thought that having cloned the new laptop with the latest system backup made from my used one that the same Wi-Fi connection to the printer would be there on the new one also. But not so. The printer was there showing on the new one, but not a Wi-Fi connection yet.
I'm glad it's solved.

The used laptop with not working buttons is on the way to the repair guys from the shop I got it from years ago. With a printed addresses label on the box.
I got that one after having bought a new laptop for some €350. I found out I got what I paid for. So I looked and found that brand new EliteBook for €950 because the original box was not with it. They told me they'd buy my cheapo laptop from me if I wanted, for €150. So I send it to them. Then they mailed me that after seeing it they were going to give me €175, put an SSD in the EliteBook for me, add a DVD player to be used with it, as it doesn't have one, and also send a Windows 7 Pro and a 8.1 Pro disk with it.
Good guys...

PS:
That Window 7 Pro disk is still unused. But it is made for HP laptops. (I'm using 8.1 with StartIsBack on it. I just like it better than 10, which my sister has, and I used for a try out. But that's just a matter of taste, as 10 is also good for those who like it.)