Hard — Drive Mbr Repair Software

: Select Repair your computer > Troubleshoot > Advanced options > Command Prompt .

bootrec /fixboot — Writes a new boot sector to the partition. Hard Drive Mbr Repair Software

If your computer refuses to boot or displays errors like "Operating System not found," a damaged Master Boot Record (MBR) is often the culprit. You can fix this using built-in Windows tools or dedicated third-party software. : Select Repair your computer > Troubleshoot >

: Insert your Windows installation USB/DVD and boot from it. Hard Drive Mbr Repair Software

bootrec /fixmbr — Writes a new Windows-compatible MBR to the system partition.