BOOTMGR errors usually are caused by corrupt and misconfigured files, hard drive and operating system upgrade issues, corrupt hard drive sectors, an damaged or a split off hard drive interface cable. Another reason could be if your PC is trying to boot from a non-bootable source, like a USB drive or a floppy drive.
How to fix “BOOTMGR is missing” error
[dropcap type=”1″]1[/dropcap]Reboot the computer.
The BOOTMGR error could appear accidentally.
[dropcap type=”1″]2[/dropcap]Check the USB ports or floppy drives for media. Often the error appears if your PC is trying to boot to a non-bootable disc, external drive or floppy disk.
[quote_box_center]If this is the cause of your issue and it’s happening regularly, change the boot order in BIOS so the hard drive is listed as the first boot device.[/quote_box_center]
[dropcap type=”1″]3[/dropcap]BOOTMGR error messages could be caused by unplugged, loose, or malfunctioning power or controller cables. Reset all internal data and power cables.
[dropcap type=”1″]4[/dropcap]Check if the Boot partition is activated, for this download Partition Wizard Bootable CD, Burn it to a CD or USB. Start the computer with the device inside (CD/USB), the Partition Wizard should show up, find the Boot partition (usually the Drive C:) check if it’s Active, if not right click on it and make it Active. Remove the device (CD/USB). Reboot.
[dropcap type=”1″]6[/dropcap]Reinstall windows. This will completely remove Windows from you PC and install it again from scratch. This will certainly resolve any errors, but make sure you back up your data to restore it later.
[dropcap type=”1″]7[/dropcap]Replace the hard drive and then install a new copy of Windows. If all steps above failed, including the clean installation from the last step, you’re most likely facing a hardware issue with your hard drive.
[quote_box_center]This solutions applie to Windows 7, Windows 8 and Windows Vista[/quote_box_center]