So, yesterday:
-updated MB BIOS, Windows didn't like it for reason, started to loop on its useless repair stuff
-went to town, bought 2 yuri manga first volumes
-went back home, tried to repair Windows, didn't work, spend part of the evening making backups cuz one of my drive seemed not to like lot of big copies without stopping to do anything
-had the great idea to tell myself "hey, how about I removed the Windows booting partitions which are on my storage drive for some reason", it took GParted the night to put everything at the start of the drive to regain 150MB😅
-now finally reinstalling Windows and put everything back in place😮💨