The error is mainly caused by a problem with the “boot manager’ file located inside Windows that may either be accidentally deleted or has been corrupted. The boot sector of the hard disk can also be filled with bad sectors preventing Windows from loading and making the error message appear. The problem can also be caused by a recent upgrade of Windows, outdated BIOS, loose IDE cable that connects the hard drive into the motherboard, and problems with some settings in your system. You need to resolve this problem to be able to enter Windows. This tutorial will help you fix the devastating “Bootmgr Is Missing” error. The problem appears on your screen due to the inability of the computer to enter Windows either because the Windows installation has been corrupted, or the device is trying to boot up from a hard disk that is not properly configured or not connected in the machine. The error message will appear on your screen after the Power On Self Test (POST) and Windows 7 has just started to appear on your screen. The Bootmgr Is Missing Error is a problem that indicates your computer could not locate your Windows installation.

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Windows 7 bootmgr