make the installer and try that method I showed above.
if it doesn't work, you could try a reset
if there anything on laptop you want to save, use this: http://www.howtogeek.com/howto/windows-vista/use-ubuntu-live-cd-to-backup-files-from-your-dead-windows-computer/
boot from installer again, select repair this pc again
select reset from 1st menu screen
2 choices, keep files and settings (recommended) and wipe everything. Both will delete all your programs but one will at least keep all the files saved in libraries (My documents, music, pictures, etc.)
which ever you chose, windows will save a few things and then restart pc and reinstall win 10
was this an upgrade from win 7 or 8, or a fresh install? If upgrade, I would suggest a fresh install at some stage as it can fix all sorts of problems.