You might have to do a reset - use that Ubuntu link I gave you to copy stuff you want to keep off C Drive and then boot off the Win 10 USB again
on screen after languages, choose repair this PC, not install.
on same menu as troubleshoot, there is reset this PC
Choose keep files and settings as this will save anything in library folders (Documents, music, pictures, movies, etc) and your logon details, but wipes everything else
PC will restart and reinstall Win 10
You will need to reinstall all your programs again.
if reset fails and says drive is locked, try step 3 here in command prompt:
http://www.tenforums.com/tutorials/1950-windows-10-clean-install.html
If reset fails, there is only one other option. Fresh Install, but if you...