How Do I Fix Missing Operating System?

How do I restore my operating system?

To restore the operating system to an earlier point in time, follow these steps:

1. Click Start. …
2. In the System Restore dialog box, click Choose a different restore point, and then click Next.
3. In the list of restore points, click a restore point that was created before you began to experience the issue, and then click Next.

What does it mean when your computer says missing operating system?

When a PC is booting, the BIOS tries to find a operating system on a hard drive to boot from. However, if it is unable to find one, then an “Operating system not found” error is displayed. It may be caused by an error in BIOS configuration, a faulty hard drive, or a damaged Master Boot Record.