windows boot manager windows 7 startup boot manger failed to find os load

windows boot manager receive a black screen and  directing  to choose an operating system to start. Windows 7 is highlighted, and after  enter to continue startup. At the bottom of the screen shows Tools - Windows Memory Diagnostic. & this process  happens at every startup  .

its easy for resolve when i checked over internet i got a lot of solutions but find a one of the best solution . after try these  windows booting process is  normal

What is exact error see the below snap

This is the best solution for this issue

1)First run the Command prompt  with administrator rights(start > programme >Command prompt right click and select Run as administrator)

How to run command prompt using  Administrator see the below snap.

2. Type the following line into the Command Prompt box:

bcdedit /set {bootmgr} displaybootmenu no

after insert these command - see the below snap.

3.Press Enter.

3. Restart your computer to allow system changes to take effect.