A Windows 10 workstation that is set to boot from the C: drive will not boot properly. An error message claiming that no OS is found is displayed. Normally, it boots just fine. What should you do to fix the problem?

The missing operating system could be because the boot sector on the hard drive is bad or corrupted, or the operating system may actually be missing. You should first make sure the boot files are not corrupted. To do this, boot to the installation media (you may have to set your BIOS/UEFI to boot to the installation media drive), then choose ➢ Next ➢ Repair your computer ➢ Troubleshoot ➢ Startup Repair and follow the onscreen prompts. Typing startup repair at a command prompt returns an error message. You wouldn't be able to boot into safe mode because the computer believes the operating system is missing. SFC (System File Checker) is used to verify OS files. It is not a program you can open and choose something in.