Liaison (Desktops, Alienware, Monitors). Forum Moderator
Upon turning on my PC, I received the message "Missing Operating System"... What should I expect after running the diagnostic program?
This is a very old post (2007). Can you tell me the model and operating system of your Dell? When do you see this error? Are you trying to run the diagnostics?
Please post back and let me know if you need more help.
I’ve got a Dell studio slim 540. Runs on Windows Vista… I see the error upon booting… right after the initial Dell screen.
It just started happening a few days ago… we had a black out and when the electricity came back up, and we booted the computer, the error came up…
That message indicates your system cannot find the operating system, so you have a problem with your hard drive. I hope you've got your important files backed up!
Go here for instructions on running the Dell diagnostics on your hard drive. You need to boot to your Dell drivers and utilities disc to test the hard drive. To test your hard drive using your Dell Drivers and Utilities disc:1. Reboot your system. When you see the Dell logo, hit F12 to enter the boot menu.2. Insert the Dell Drivers and Utilities disc in your CD/DVD drive.3. Pick the option to boot from the CD/DVD drive.4. You will be prompted to hit any key to continue booting from the CD/DVD drive.5. You will be prompted to hit 1 to run the Dell diagnostics. You may see two such menus.6. Select Test System.7. Select Custom Test.7. Use the arrow keys or mouse to select your hard drive.9. Click Run Tests.10. Write down any error messages.