A Master Boot Record (MBR) is a small program that is invoked when the system boots up. It resides on the first sector of the hard disk. Without a valid MBR, it's impossible to boot the system from the hard disk. Usually, the MBR targets the system's boot sector. So, when the system is switched on, the hardware calls the MBR. Then, the MBR redirects the system to the boot sector so that the boot process can begin.
However, it is not a cakewalk every single time. There are numerous types of viruses developed that attack the MBR of a system. Yes, you can remove the virus using an antivirus program and it will be as good as new. However, at times even after removing the virus you are not able to boot the system. You should try to resolve the situation using some in-built methods. However, if you are not able to recover Windows files, then you should consider using a third-party Windows data recovery software.
What happens is that the viruses affect the MBR by copying the contents of the boot sector to a different file and then overwriting the boot sector with infected code. When you remove a boot sector virus, the antivirus program is efficient enough to find out the location where the original boot sector was copied. It then removes the infected code and moves the boot sector code back to its correct location.
Unfortunately, some viruses do not back up the boot sector code before altering it. Because of this, the system is not able to boot as it is not able to find the boot sector, which eventually results in the corruption of the hard disk.
If you are using Windows 2000, then you should boot the system from the installation disk (Boot CD). Enter the Recovery Console, when prompted. When the Recovery Console loads, use the FIXBOOT and/or FIXMBR command to fix the problem.
However, if you still are not able to recover Windows system then you should use a third-party Windows data recovery tool to do so. Such tools are read-only in nature and do not overwrite the data while scanning the hard disk.
Stellar Phoenix Windows Data Recovery software is an efficient tool that can recover lost, deleted, and formatted data from the Windows systems. It is able to recover about 185 different types of files.
Windows recovery software is available with a Boot CD so that you are able to recover if the system is unable to boot. It is able to repair FAT12, FAT16, FAT32, VFAT, NTFS, and NTFS5 file systems. It is compatible with Windows 7, Vista, 2003 Server, XP, and 2000.
Recovering Windows system after corruption in MBR