Susan —
That message indicates that your Operating System is corrupted and needs repair or replacement. According to the specs, the computer has an optical drive (DVD). Use a Windows system disk to boot the computer. At the boot-up screen, choose “Repair.” In many cases, this will repair the OS and allow the system to boot. If this works, all of your programs and data will be retained.
If it does not work, you will need to reinstall Windows, in which case, your programs and data will be lost. There is a way to export your data to USB drive, but programs will be lost.
Post any questions and I will try to help.
Good luck,
Russ Walden