How to Fix Damaged Windows MBR

Hard disk, being an integral part of computer, is the main storage device of computer data. It features one or more rotating rigid platters on a motor-driven spindle within a protective enclosure. Data is encoded magnetically by read/write heads that float on a cushion of air above the platters. is the 512-byte boot sector that is the first sector of a partitioned data storage device such as a hard disk. The boot sector of a non-partitioned device is a volume boot record. These are usually different, although it is possible to create a record that acts as both; it is called a multiboot record. The MBR is not located in a partition, it is located at a main boot record area in front of (with a lower LBA sector number than) the first partition. In cases where the disk has a BIOS overlay or boot manager installed, the partition table may be moved to some other physical location on the drive; e.g., a partition manager often places a copy of the original MBR contents in the second sector then hides itself from any subsequently booted OS or application, so the MBR copy in sector 1 is treated as if it were still residing in the first sector. MiniTool Partition Wizard is the very partition manager to fix MBR with powerful functions.

Disk management functions of MiniTool Partition Wizard
1. copy entire disk
2. delete all disk partitions
3. wipe disk data and offer enhanced privacy protection
4. recover lost partition and deleted partition
5. view disk properties
6. detect bad track
7. rebuild disk MBR
8. convert disk type
9. convert MBR disk to GPT disk
10. convert GPT disk to MBR disk
Above is part of disk management functions provided by MiniTool Partition Wizard. User could download MiniTool Partition Wizard at MiniTool Partition Wizard Download Center to find more excellent funtions.

Since the operating system is unavailable, user needs to employ MiniTool Partition Wizard Boot CD to resolve boot problem which has the same operation with MiniTool Partition Wizard. The following is demonstration on how MiniTool Partition Wizard fixes MBR.
User would meet following interface after running MiniTool Partition Wizard. 

Select and right click the disk to be rebuilt and then click "Rebuild MBR". 

Lastly, click "Apply" in this main interface to execute pending operation, fixing MBR successfully.