After performing mistaken operation or suffering virus attack, users may receive the message “Operating system not found” when they restart computer. That is mostly because MBR has been damaged. Well then, how to free recover damaged master boot record when Windows can not boot? Here, we suggest using the free bootable partition manager MiniTool Partition Wizard Bootable CD since it can boot computer without OS.
Importance of Master Boot Record
After BIOS finishes a series of checks, it will jump to MBR which contains executable code to function as a loader for the installed operating system. Then, primary boot loader runs from MBR and jumps to secondary boot loader in PBR to start Windows OS. Once MBR is damaged, the entire boot process will interrupt so that Windows can not boot. Therefore, to free recover damaged master boot record becomes quite significant, and MiniTool Partition Wizard Bootable CD can help complete this work with ease.
Note: Partition Wizard Bootable CD is an iso file, so users need to burn it to CD, DVD, or USB flash disk so as to make a bootable disc.
How to Free Recover Damaged Master Boot Record
Firstly, insert the bootable disc which contains MiniTool Partition Wizard to start computer, and then the following interface will emerge:
If this interface does not emerge and the computer boots from local drive, users need to make the CD-ROM (for CD/DVD bootable disc) or removable device (for bootable USB flash disk) enjoy boot priority in BIOS setting. If this interface merges, please choose one of boot modes from the former 3 and press on Enter key.
Then, users need to choose a reasonable display resolution. After that, MiniTool Partition Wizard will start successfully:
Here, please select the disk whose MBR gets damaged and choose “Rebuild MBR” feature from the left action panel.
At last, click “Apply” button on the top left corner to apply the change. Once it is completed, the damaged master boot record will be recovered for free. And then users need to shut down the free bootable partition manager and take out the boot disc or USB flash drive.
Now try using MiniTool Partition Wizard Bootable CD to rebuild MBR if it gets damaged.