One such tool is UNetbootin, another you may want to try is called LinuxLive USB Creator. If you actually intend to boot from a USB device and you always get the error that your boot manager is missing, I recommend that you look into tools that can make your USB device bootable. This might take some time, depending on the size of your hard drive, but it is necessary to verify that there are no corrupted files on your disk. This would be your original installation disc, a USB drive with Windows 10 on it even better a recovery device that you created previously.Īlternative Method 1: Repair bootmgr via Command Prompt (cmd) If you are on Windows 10, insert your recovery device. We have outlined the steps that are necessary to repair the boot manager: Step You’ll get a list of operating systems installed on your PC: You should Click on “Repair your computer”:Ģ. Once you see the Windows installation screen there will be an option to repair it (below Windows 7, but Windows 10 still works similarly).
Alternatively, go into your BIOS, change the boot order to boot from your external drive. On boot-up press F8 to get to startup options. Step Insert your Windows DVD or USB device. Please locate your Windows DVD before proceeding, in case we need it, but we can proceed without if you don’t find it.ġ. To repair your boot records, you have to launch the start-up option “repair your computer”. This fix works on all major Windows versions including Vista, 7, 8 and 8.1 and most likely later versions Repairing Boot Records in Windows 7 (Skip for 10) Please verify all of your external USB devices are disconnected before proceeding. If your bootmgr file is missing that doesn’t necessarily mean that you lost any data, it simply means that your boot manager is missing, nothing more right now. First of all, don’t panic and do stupid things without thinking.
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