Weird windows 10 welcome tour guide on boot

Hi, i was recently infected with some coinminers, successfully cleaned them up and did a repair install. Works flawlessly and smooth. But something very weird(at least to me) happened.

A very meticulous "welcome/offer" screen welcomed me today. It was a blue window on a black background, no pixelation, very professional looking design. It asked me if i wanted to sync my android phone, if i had an office sub (or if i wanted a free trial) it was very detailed, asked my phone number (lets me skip) but it was mandatory to enter my password to keep using my pc. (i think it was 2nd or 3rd step in this relatively long tour)

Am i infected again? Malwarebytes says no but I've never seen or heard this happen before... Can someone tell me what kind of welcome screen i witnessed so i can look it up?