BOOTMGR is missing - only when multiple HDDs plugged in not boot order Tags: Configuration Boot Motherboards Windows 7 Last response: April 22, 2013 7:40 PM in Windows 7 Share baldtrini September 22, 2012 11:05:19 PM I have just installed a new P5G41T-M LX Series motherboard and two DDR3 x 2GB replacing DDR2. During startup a message says BOOTMGR is missing, press Ctrl Alt Delete to restart, on restart the same message is repeated. More about : bootmgr missing multiple hdds plugged boot order Nedal0 September 22, 2012 11:25:18 PM You need to go into your BIOS Setup and make sure the HDD with your OS is set as your first boot device. Also you might want to check the jumpers on your second HDD if its not a SATA HDD Make sure your SATA data cables are in the correct places. First HDD (with OS) should be plugged into SATA port 0 on you Motherboard and 2nd HDD in the next available port. Good Luck m 0 l battler624 April 22, 2013 7:40:03 PM Change the boot priority to which HDD you have the OS installed on. m 0 l Can't find your answer ? Ask ! Publish Related resources BOOTMGR is missing - only when multiple HDDs plugged in not boot order Forum Solvedcan not boot from any device or change boot order.message;insert bootable disc and bootmgr missing (win 7)HP.Presario.c700 Forum More resources Read discussions in other Windows 7 categories Configuration Customization Drivers Security Laptops !