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bootmgr is missing

Discussion in 'Windows 7' started by alekhya777, Aug 12, 2018.

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  1. alekhya777

    alekhya777 Thread Starter

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    hi, i tried to dual boot my lenovo think pad laptop. i have win 7 as my existing o.s. I opened disk management and on the d:/ drive i made it into active. and i turned off my laptop. when turned it.. my laptop is keeps on showing "Bootmgr is missing... press ctrl+alt+del to restart.. " message.
    what should i do now?
     
  2. DaveA

    DaveA Trusted Advisor Spam Fighter

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  3. alekhya777

    alekhya777 Thread Starter

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    is there anyway now to change that option
     
  4. managed

    managed Trusted Advisor Spam Fighter

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    So you have 7 already, what did you try to dual boot it with ? Do you have an install DVD or Usb stick for any version of Windows or Linux ?
     
  5. alekhya777

    alekhya777 Thread Starter

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    i have windows server 2012 r2 iso file with me in my pendrive. but to install that o.s i need to unzip the iso file. so i again require my laptop to do that. :(
     
  6. managed

    managed Trusted Advisor Spam Fighter

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    Well you will need a bootable DVD or Usb stick you can use to boot into a Windows install or recovery environment, or a Linux live OS, then you can change the active partition to the System Reserved partition, probably the first one on the hard drive. That should get you back into 7.

    Can you get access to another computer ?
     
    Last edited: Aug 12, 2018
  7. alekhya777

    alekhya777 Thread Starter

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    which software do i require to change active partition into system reserved partition? can i do that by installing win serv 2012 r2?
    i read that we can have only one active partition for 1 hard disk. whats that exactly means?
    while dual booting.. i want to install win ser 2012 in another d: drive. is that possible? if so, can i have 2 active partitions possible?

    Thanks in advance
     
  8. managed

    managed Trusted Advisor Spam Fighter

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    I think you can change the active partition if you boot your win serv 2012 install media, you don't have to install it (although you can do that after setting the active partition if you wish).
    You can get to a command prompt in the early part of the install sequence and change the active partition using Diskpart which is a special utility you run from the command prompt.
    Windows 7 usually makes a small partition called System Reserved at the start of the hard drive when it's installed. The SR partition contains the boot up files and it will be the active partition even if you install 2012 as a dual-boot with 7. If you install 2012 you will get a menu to select which you want, 7 or 2012.

    The active partition is the one that the system will look at for the boot up files, there can only be one active partition on a hard drive.
     
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