Recover DBR by Format

If there is no important data in this partition, or you have backed up the data, the best way to recover DBR is direct high-level format, fast format or complete format. If there is no limitation of partition form and capacity, there would be no difference between DOS format and Windows format except speed. Format is quite thorough, it can completely rearrange the data storage, even “reset” former file fragmentation.

Although this method is simple, it cannot recover data actually especially if you choose some different parameters. If you choose different system reserved sectors, or use clusters of different size, or change the size of FAT table etc, data recovery will be more difficult.

Data recovery by Fixboot of Partition Table Doctor
If the boot sector of a Fat16/Fat32/Ntfs partition was corrupted, it will be marked with X by Partition Table Doctor. If you cannot access a Fat16/Ntfs partition and the partition was marked with X. Right click the partition and choose Fixboot. Partition Table Doctor will automatically check and restore the boot sector of the partition.
If you cannot access the Fat32 partition and the partition was marked with X Right click the partition and choose Fixboot, there will be two choices:
'Auto' mode: Partition Table Doctor will automatically check and restore the boot sector of the partition. We recommend you choose this mode. If 'Auto' mode cannot help you, you can choose 'Interactive' mode. If so, you need input the volume label or a file name (under the root directory).

If you do not know what file name to input, follow the file name that is suggested: Boot partition:
io.sys msdos.sys ntldr bootlog.txt Other partitions: _restore recycled

Note: For Fat16/Fat32 partition, fixboot can effectively restore damaged boot sector of partition. For NTFS partition, even if boot sector is correct but MFT (Main File Table) is corrupted, symptoms are the same. We recommend you download the demo version of Partition Table Doctor to determine whether boot sector of partition was corrupted. Mostly, scandisk that originally in operation system will destroy more than they retrieve. Please stop scandisk after logging on.
In addition, you may use WinHex to recover DBR

WinHex is powerful in disk editor. With backup DBR in WinHex to recover the DBR sector is convenient and fast. But for its strong specialization of WinHex we recommend that you choose easy-to-use software tool for integrity and correctness of the data.