I got a legit windows 8.1 install, i used a software so i could boot from my usb.
Im currently updating my system (the install worked perfect (first i format all my hdd+SSD))
I have over a 100 update to install, around 50 of them are already done. so far so good.
I keep you posted when all of my update have been done, fingers cross that i won't get the same problem.