To avoid data loss, you can create a backup of your MBR. Although Windows 7 does not include native MBR backup capability, you can complete this task using MBRtool, a free utility. If you find some difficulties while performing any of the below mentioned steps on your own, then you can also take help from online technical support at their Toll Free No +1-877-452-9201 For US/CA.
Steps to Fix MBR (Master Boot Record) in Windows 7
• Click the "Repair your computer" option.
• Wait for the installer to scan for Windows operating systems on the computer. Select "Windows 7" from the System Recovery Options window that appears and click "Next."
• Select "Command Prompt" from the list of recovery options that appears.
See also: How to Use Backup and Restore in Windows 7

