Loose data cables, failing hard drives, or damaged sectors on your storage disk. The Danger of Downloading BOOTMGR from Third-Party Sites
Rebuilds the code structure holding your startup configuration. windows 7 bootmgr download
Type select disk X (replace with the number of your primary hard drive, usually 0). Type list partition to view the partitions on that drive. Loose data cables, failing hard drives, or damaged
Select , select your Windows 7 installation from the list, and click Next . Loose data cables