Says checking media [fail]
Please reboot or restart and one time said reboot with disk or USB
So I'm guessing it has to do with she touched the settings or got a virus or it might needs a new hard drive but don't wanna buy an new hard drive until I have tried everything else.
It could be due to either or it could even be a hard drive failure. The real problem with Windows 8 is getting a disk since it is not available for download. I would download and boot from a copy of Hiren's Boot Disk HERE. It has tools to check the hard drive and is free.
If you suspect a virus, you can download, make a boot disk and boot from Kaspersky Rescue Disk 10 HERE. After booting from the disk, allow it to update and then scan the hard drive.