How to fix error “operating system not found” on Sony Vaio?

Error: Operating system not found on Sony Vaio

Operating System not Found


“I have an older Sony Vaio Laptop, model VGN-NR280E, that was loaded with the Vista operating system. I used it well,but recently, it shows an error when booting: operating system not found. What’s wrong with it? How can I fix it? Any help would be thanks.”

How to fix error “operating system not found” on Sony Vaio?

To fix the error  operating system not found” on Sony Vaio, you can do as the following steps:

  •  Shut down laptop by holding the power button on the keyboard.
  • Start laptop by holding the Assist button on the keyboard. The laptop will automatically go to “VAIO Care” mode of Sony Vaio.
  • Choose “Start BIOS setup”, or you can press F2.
  • Choose the tab “BOOT” on the Menu.
  •  Here you need to get into “Boot Configuration ''Boot Mode”, and you can see the current is UEFI.
  • Press “Enter” and choose “Legacy” to change the value.
  •  In Extend Device Boot, change the value from “Disabled” to “Enabled”.
  • Save all that have changed by select the tab “Exit” on Menu, choose “Save Changes” 

As so far, we have repaired “operating system not found” on Sony Vaio successfully. 

Fix 1: Change or reset the BIOS configuration

Since boot device not found or operating system is missing occurs when BIOS is unable to find the boot device, checking BIOS settings might be a good solution. To check the BIOS settings, follow these steps:
  •  Restart the computer.
  • Press the key to open BIOS menu. The key depends on the computer manufacturer and computer model. It can be any of the following: Esc, Del, F2,F8, F10, or F12.
  • When you get into the BIOS’ main screen, you need to check whether it detects the hard drive, and whether the boot order is right.
  • If the hard drive is not detected properly, you should reset the BIOS settings to default values.

Fix 2: Check hard drive is working or not

The “operating system not found” in Sony Vaio or other brands like HP, Asus, Dell, Samsung, etc, may because of faulty hard drive. Sony support number. Thus, you need to check whether the hard disk is working or not in BIOS.

  •  Plug the AC Adapter into the computer if it is not already connected.
  •  Turn off the computer and wait 5 seconds.
  •  Press the Power button to start the computer and repeatedly press the special key to enter the BIOS Setup menu.
  • Use the Arrow Keys to choose Diagnostics or Tools to check hard drive is working or not

 Click Start to check the hard disk.

Start Test System Disk

If there is nothing wrong with the hard drive, you can find other solutions for “operating system is not found” on Sony Vaio or other computer. Sony support phone number. If there is bad sectors, you can try to fix it or replace the disk with good one.

 Confirm the operating and click Apply.

Apply

Finally, remove the boot able device, and restart your computer from the hard drive normally.


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