Looking at the situation which you have provided over here I am suggesting the following instruction which you should use to meet the requirement of yours. You should run the following things on the command prompt and press enter.
Code:
Drive:\boot\Bootsect.exe /NT60 All
Here Drive: is the location where you have installed windows. Now use the below mentioned command on the command prompt.
Code:
Drive:\Windows\system32\Bcdedit /create {ntldr} /d "Description for earlier Windows version"
Drive:\Windows\system32\Bcdedit /set {ntldr} device partition=x:
Drive:\Windows\system32\Bcdedit /set {ntldr} path \ntldr
Drive:\Windows\system32\Bcdedit /displayorder {ntldr} /addlast
Once you have completed with the above mentioned command. You should reboot the computer of yours.
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