When starting a computer running windows vista, a technician sees that the error message "bootmgr is missing" appears after the post. what are two possible solutions for this problem? (choose two.)a. restore boot. ini from the installation media. b. restore bootmgr using the windows recovery environment. c. run the bootrec /fixboot command. d. run virus removal software. e. secure the display adapter on the motherboard. f. run chkdsk /f /r from the recovery console.