Question: How Do I Fix a Missing Operating System Error?

How do I fix missing operating system on my computer?

Follow the steps below carefully to repair the MBR.

1. Insert the Windows Operating System Disc into the optical (CD or DVD) drive.
2. Press and hold the Power button for 5 Seconds to turn off the PC. …
3. Press the Enter key when prompted to Boot from CD.
4. From the Windows Setup Menu, press the R key to start the Recovery Console.

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.