One day, you are trying to start up your computer. Before the operating system loads, a message "BOOTMGR is missing" appears, instead of being directed to your Windows desktop.
BOOTMGR is missing error occurs due to various reasons. The most common ones include corrupt and misconfigured files, hard drive and operating system upgrade issues, corrupt hard drive sectors, an outdated BIOS, and damaged or loose IDE cables. This error also surfaces when your PC is trying to boot from a hard drive or flash drive that is not properly configured to be booted from. This also would apply to media on an optical drive or floppy drive that you're trying to boot from.
To fix such an error, you need to run a startup repair on the system. It seems an intimidating and risky process, however if you select a good tool, it can actually be relatively simple. Fix Genius is the very software you can rely on. It is easy-to-use, cost-effective, and risk-free for every user with every computer level to fix all computer errors including "BOOTMGR is missing".
Below you can find a detailed tutorial.
Download, install and launch Fix Genius on a usable computer. Insert a CD into this computer. Here you can use a DVD disc or a USB flash drive as an alternative. This software will automatically check your CD drive, and you just need to click "Burn" button only to finish the process of burning a boot CD.
Since you can't login into Windows system from hard drive normally, you need to utilize the CD you burn in Step 1. Plug it into the computer that appears errors. Change the boot order in BIOS setup to set the CD as the first boot device. Your computer will reboot automatically and enter the system which is burned on the CD.
After you load into the system, you will see a desktop. Double click the icon of Fix Genius to launch it. Go to "Windows Rescue" and select "Crash before Loading Bar". Because the causes of such an error are varying and complicated, you need to try the tools this software provided one by one until your computer works well.
Done, you have thoroughly fix BOOTMGR is missing. Quite easy, isn't it? Next time, you encounter this issue, try the method above.