How can fix mbr

What happens if MBR is corrupted? Generally, as a result, your computer may fail to boot and prompts one of the following error messages during OS initial: Error loading operating system ; Operating System not found; Invalid partition table; No bootable device found; Reboot and select proper boot device.

Tutorial 1. Tutorial 2. Remove the DVD and restart your computer to check if it can boot up successfully. Still Need Help? Have your problem been solved? More recently, the Petya variant of ransomware has been causing MBR problems.

Then in August, a pesky bit of malware popped up on FossHub that overwrote the MBR, which caused headaches for affected users. And the master boot record can sometimes be damaged via less hostile actions, as well. On top of that, the method for fixing it is far from obvious. The main way to fix the MBR is to use a command prompt and run the bootrec. But the latest versions of Windows offer an easier method for running recovery commands without external media. Keep turning the computer on and off until you see your PC booting into automatic repair.

It should only take a few reboots. Use the ScanOS option when the Boot Manager menu does not list all the operating systems installed on your device. This option will scan all drives to find all compatible installations, and it will display the entries that are not in the BCD store.

While in the Command Prompt using the recovery environment, type the following commands and press Enter on each line:. Press Y to confirm adding Windows 10 to the list of the bootable operating systems on your device. Close Command Prompt. Once you complete the steps, reboot your computer, and then Windows 10 should once again load normally. We are focusing this guide on Windows 10, but these instructions should also work on Windows 8.

Update January 21, Originally published in May , revised in January