If the “Are you sure you want to write a new MBR?” message appears, press Y and hit Enter
Error loading operating system (see our Error loading operating system: Fix for Windows XP, Vista, 7, 8, 10 guide). If the Master boot record is broken, your computer may show some of the following errors: In this command, /path-to-get/mbr-backup is the path where you have the mbr-backup stored. You can restore the saved Master boot record using this command: dd if=/path-to-get/mbr-backup of=/dev/sda bs=512 count=1 Important: Restoring your Master boot record with the wrong partition table will make your data unreadable and will make it very hard to recover your data later. In the above command, /path-to-save/mbr-backup is the path where you want to save mbr-backup. You only need one command to backup the MBR: dd if=/dev/sda of=/path-to-save/mbr-backup bs=512 count=1 You can backup the MBR since it’s stored on the hard disk and you restore it later, when needed. It can be damaged by certain viruses that target the MBR to replace it with their own code or in cases when you dual boot with a Linux distribution (see Error: no such partition. All Windows versions – Windows XP, Vista, 7 or 8 – use MBR and, if damaged you won’t be able to boot. If the MBR is damaged, you won’t be able to boot into Windows. It’s the first 512 bytes of your hard disk. The Master boot record is created when you first install Windows, on the first partition you create. The MBR (stands for “Master boot record”) is a boot sector (a region of your hard disk) that holds information about the partitions of your hard drive and acts as a loader for the operating system you’re running. 2 Fix the MBR with Easy Recovery Essentials.
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