$250 to fix a laptop? ouch. Can try to fix it for free
You can use this to copy any files off laptop she wants to rescue - make sure to virus scan them before putting them back on a PC: http://www.howtogeek.com/howto/windows-vista/use-ubuntu-live-cd-to-backup-files-from-your-dead-windows-computer/
If you can save files, I would just clean install win 10 and start afresh. On another PC, download the
Windows 10 media creation tool and use it to make a win 10 installer on USB
change boot order so USB is first, hdd second
boot from installer
Follow this handy guide:
http://www.tenforums.com/tutorials/1950-windows-10-clean-install.html
when asked for licence , click "I don't have a key" and win 10 will continue install and...