When the BIOS setup screen appears, press the right arrow key ( ->) to select the Exit menu section.

Restart the computer and press the F2 key when the VAIO logo appears.

Remove any peripheral devices you may have connected to the laptop.

Here are the steps to reset VAIO’s BIOS settings if you have Windows XP, Vista, 8 or 8.1: The eSupport section of suggests the following solutions if your VAIO laptop is showing this error: Fix #1: Rebuild BCD via Easy Recovery Essentialsīootrec utility results screen Fix #5: Reset BIOS settings on Sony VAIO Laptop EasyRE will automatically find and fix many problems, and can also be used to solve this problem with the directions below. If your PC did not come with a Windows installation disc or if you no longer have your Windows setup media, you can use Easy Recovery Essentials for Windows instead. Some of the solutions below require the use of the Microsoft Windows setup CD or DVD. Fixing “Operating system not found” on Windows Try to unplug, and then plug them back, or even replace them altogether and see whether the problem persists. If the BIOS is unable to detect the hard drive, the faulty data cables are often to blame.

Similar to the errors outlined in the BCD is missing and BCD is corrupt articles, this error can also appear when BCD becomes damaged. The BIOS configuration can become incorrect because of power outages, hardware errors or errors made when configuring the BIOS manually. Since this error occurs when BIOS is unable to find the operating system, checking the BIOS settings first is often a good solution. This error has been known to occur as a result of one of the following causes: Cause 1: Bad BIOS configuration This error is also very common on Sony Vaio Laptops. It may be caused by an error in BIOS configuration, a faulty hard drive, or a damaged Master Boot Record.Īnother possible error message is “ Missing operating system“. However, if it is unable to find one, then an “Operating system not found” error is displayed. When a PC is booting, the BIOS tries to find a operating system on a hard drive to boot from. Symptom 1: “Operating System not found” error screen on startup The error messages, alerts, warnings, and symptoms below are tied to this error. The following information on this error has been compiled by NeoSmart Technologies, based on the information gathered and reported by our global network of engineers, developers, and technicians or partner organizations.

3.5 Fix #5: Reset BIOS settings on Sony VAIO Laptop.

3.4 Fix #4: Rebuild the BCD using bootrec.exe.

3.2 Fix #2: Change or reset the BIOS configuration.

3.1 Fix #1: Rebuild BCD via Easy Recovery Essentials.

3 Fixing “Operating system not found” on Windows.

1.2 Symptom 1: “Operating System not found” error screen on startup.

Please install an operating system