Debra, BOOTMGR is missing, indicates files needed to start Windows are inaccessible, missing, or corrupted. Instructions and trouble shooting link below should enable you to fix this problem. Check the attached links,instruction and guides, Good luck.
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http://acer--uk.custhelp.com/app/answers/detail/a_id/4102/~/bootmgr-is-missing-error-message-on-boot