The problem started yesterday when I wanted to make it dualboot with win7 and win10, but I wasn't able to shrink the volume even tho i had 70\120gb free, so I tried using 3rd party software (minitool partition wizard) to do that. I gave the new partition 25gb for win7, but it said a restart is required. I did that, but it was never able to boot back into the OS, so now I am looking for solutions... If nothing else works I will just reinstall win10 and backup all the important data from it, since it's still recognized. Does anyone have an idea what I should do?