Down grade from Windows 8.1 to 7 NTLDR missing

HI,

I have a problem. I downgraded from windows 8.1 to windows 7 with genuine key etc. However as I don't know much about secure boot and new uefi I just probably messed up the bios config. Now I'm getting NTLDR Missing. Could someone help please. Thanks
sorushnazariAsked:
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adamdalgCommented:
try resetting the bios boot order.
adamdalgCommented:
If it is not a boot order issue, you can try holding down F8 at startup.  Go to the "advanced boot options" and then select "repair your computer".
David Johnson, CD, MVPOwnerCommented:
ntldr missing means that you are trying to boot a drive that has a windows xp boot sector on it.  More precisely a windows 5.2 boot sector.

what steps did you use to downgraded from windows 8.1 to windows 7 with genuine key.
Did you roll back to a previous build of windows? from the advanced recovery menu?

If you have more than 1 hard drive you probably have set the wrong hard drive in your boot order. Rolling back from a Windows 7 upgrade to windows 10 does not entail entering the bios.
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nobusCommented:
in case you need to repair the ntloader, here's how :
Boot using the Windows XP installation disk, press R. Then type the following commands:
note : you can test after each command

      FIXMBR
      FIXBOOT
      BOOTCFG /rebuild

      cd\
      copy E:\i386\NTLDR c:\
      ATTRIB -arsh ntldr
      copy e:\i386\NTDETECT.COM
      ATTRIB -arsh ntdetect.com c:\

E: should be the location of your CDRom where you have the Windows install disk located.
and check if those files are in the root :   NTLDR   boot.ini     ntdetect.com

Contents of the boot.ini file :
[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /fastdetect

check this too for more info :  http://tinyempire.com/notes/ntldrismissing.htm#What_if_none_of_the_options_worked?

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Jackie ManIT ManagerCommented:
You need to disable the secure boot control is BIOS.

Reference:
http://www.eightforums.com/tutorials/13326-downgrade-windows-8-windows-7-a.html
David Johnson, CD, MVPOwnerCommented:
@nobus: windows 7 does not use ntldr it uses bootmgr.exe instead.

bootsect /nt60 c: /force /mbr   <<this will change it to a bootmgr.exe boot >>
bootsect /nt52 c: /force /mbr   << changes it to a ntldr boot>>
nobusCommented:
@ david : i know that - but since he got the NTLDR message, and no person gives all the info, he may even have upgraded first from XP....for all i know
sorushnazariAuthor Commented:
Thank you for all your help. I tried all the suggestions, and apologies about the delay in reply. But I decided to just format the entire disk and install windows 7 from scratch. The problem seemed to be that there were more than 4 primary partitions and I couldn't install it on the one that was already empty.
sorushnazariAuthor Commented:
This might work for some cases but in my case I had a situation where it wasn't possible to install the OS 7 on the partition in question as there were too many active partitions and primary partitions.
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