Either my hard drive is lacking a BOOTMGR or the BOOTMGR for the hard drive is missing, because nothing will boot from the USB. In the open screen, choose your preferred language, time currency and Keyboard. Insert your USB bootable drive or Windows Installation DVD disc, restart your computer and boot from USB or CD/DVD drive. Installation & Setup: bootmgr is missing. I am trying to install windows 7 off of my usb harddrive and I get a 'bootmgr is missing. CD/DVD not recognised, USB bootmgr missing.
BOOTMGR is missing, press Ctrl+Alt+Delete. Fix BOOTMGR missing with a bootable CDīootmgr is missing: no installation or recovery disk! BOOTMGR is missing - Bootable USB. If this has nothing to do with your hardware, there are 2 solutions for you to fix 'BOOTMGR is missing' issue in Windows 7, Vista, XP, etc. You can't use your computer normally till it's fixed. It's really annoying encountering 'BOOTMGR is missing'.