This is not something we highly recommend to you as it is pretty risky, so make sure you now have a backup of your PC in case something goes wrong during the process. To trigger it in Windows, you simply need to hold down the Shift key while clicking on the Restart button. In Windows 10, Startup Repair is a big part of the Advanced Startup Options menu.įor some background, the Advanced Startup Options has been available in Windows 10 since day one, providing you with a reliable tool to fix many Windows problems. Windows 10 includes a built-in tool that lets you fix certain problems like missing or corrupted files. Once you are done, restart your computer. Plus, we recommend you disconnect your computer from all of your peripherals. In this case, make sure you use a different power cable or buy a new one to see if the problem is fixed. You need to burn ISO to USB or DVD again and make sure it is completed successfully.įix #4: Use a Different Power Cable or Disconnect All PeripheralsīOOTMGM errors could be caused by malfunctioning power cables. If the computer boots from an OS installation USB or DVD and you saw this error, then it is highly process that the burning process failed. If this was the problem, make sure set the first booting device to proper ones. If the first booting device has no OS burned into it or booting information is missing in target devcie, then this error will pops up for sure. If the problem is still there, then move on to the next step.įix #2: Check First Booting Device in BIOSĪs we said before, BOOTMGR is missing error mostly happens when booting the OS from external device like USB or DVD. We recommend you restart your PC before doing anything. In reality, a restart helps you fix most of Windows problems and gets everything back to order. One common way to fix the error is to restart your computer.
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