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Rebuild the MBR directly without using CD

If the boot order is right, you can proceed to the following methods. If the system disk is not in the first place in the boot order, you can move it to the top of the list of hard drives. You will see the system devices in order of priority. Use the arrow keys to select the Boot tab. Restart your computer and constantly press a specific key (usually F1, F2, F10, Delete, Esc) to enter BIOS setup menu.

To check the BIOS boot order, take the below steps: If a wrong hard drive is set as the first boot disk, the “Error loading operating system” will absolutely appear in Windows 10/8/7. Check the boot orderįirst of all, we had better ensure the boot order is correct especially when there are several hard drives on your computer. NOTE: all the following methods operations are carried out in Windows 10 as an example. No matter what makes your computer pop out the boot error message, below are several methods through which you can fix this annoying issue with ease.

5 Solutions to “Error loading operating system” in Windows 10/8/7 ▸Some bad sectors on the system hard drive. ▸Multiple hard drives have been connected to your computer, then the computer cannot detect which one is the primary hard drive containing the operating system & system applications. ▸The system BIOS does not support the hard drive. ▸The operating system’s files and folders are damaged. ▸Computer hard disk MBR information is not right. ▸The hard drive’s system partition is damaged.

Besides the physical damage of hard drive, the following causes can also make your Windows not to load successfully: If something goes wrong during the process, the operating system won’t be launched successfully. What causes "Error Loading Operating System"?Īs we all know, when a computer powers on and starts up, its BIOS and CMOS will check the system setup, hard drives, and then boot the operating system. To find out the most suitable fix, it is necessary to learn the possible culprits. Most computer users might have met this irritating problem when starting Windows 7, Windows 8/8.1, and Windows 10. What do you know about such problem? How can I fix this issue in Windows 10? Thanks for any suggestion!” I am worried about whether there is something wrong with my computer. “Hello, experts there! Recently, whenever I try to boot my Windows 10 computer, it says "Error loading operating system" on a black screen after the computer is powered on.