Solved "BOOTMGR is missing" error in Windows 7 OS (Rev: 1.0)

After the Dell Optiplex GX620 pc with Windows 7 Enterprise x86 Operating System (OS) was powered on and had completed the Power On Self Test (POST), the "BOOTMGR is missing. Press Ctrl+Alt+Del to restart" error message appeared. I performed the below to solve the "BOOTMGR is missing" error:

1. Booted up the Dell Optiplex GX620 pc from the Windows 7 Enterprise DVD. When the "Press any key to boot from CD or DVD" message appeared, simply press any key. After Windows 7 had finished loading files, it will start Windows. Kindly click "Next" when it prompt the 'Enter your language and other preferences and click "Next" to continue'.
   
   
2. Clicked the "Repair your computer" options. At the "System Recovery Options" dialog box, I chose the "Windows found problems with your computer's startup options. Do you want to apply repairs and restart your computer ?" and clicked the "Repair and restart" button. After a while, the pc restarted but it still had the "BOOTMGR is missing" error.
   
   
3. Hence, I boot the pc from the Windows 7 Enterprise DVD again. I clicked the "Repair your computer" options. At the "System Recovery Options" dialog box, I chose the "Use recovery tools that can help fix problems starting windows. Select an operating system to repair. If your operating system isn't listed, click Load Drivers and then install drivers for your hard disks", select the "Windows 7 Enterprise (recovered)" OS and clicked "Next".
   
   
4. At the "System Recovery Options" dialog box, I clicked "Startup Repair" -> "Automatically repair". After a while, I restarted the computer to complete the repairs by clicking the "Finish" button. The Dell Optiplex GX620 pc boot up Windows 7 Enterprise OS normally without showing the "BOOTMGR is missing" error.
   
   Notes:
   
   At the "Click here for diagnostic & repair details",
   
   Session details
   ---------------
   System Disk = \Device\Harddisk0"
   Windows directory = c:\windows
   AutoChk Run = 0
   Number of root causes = 1
   
   Boot caused found:
   ------------------
   Boot manager is missing or corrupt.
   Repair action: File repair
   Result: Completed successfully. Error code = 0x0