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Question

Windows 7 unable to load and computer keeps restarting.

Reason
A driver or a program is set-up or configured to load when Windows starts. However, for whatever reason, if the underlying file is either damaged or absent, you will face start up errors and issues. Usually, you have to reinstall the driver or application to fix the problem, or remove the references that are causing the problem (that is, the code that is telling the computer to run that program).
The solution to the problem

Follow the instructions to resolve the problem when Windows 7 unable to load and computer keeps restarting:

    1. 1

      Set your BIOS to use the DVD drive as the primary boot device:

      1. Restart your computer.
      2. Press the appropriate key on boot menu to go to ‘Bios settings’. (Del or F2 etc)
      3. Check for primary boot device setup.
      4. Change it to DVD drive.
      5. Press ‘Save’ and ‘Exit’.
      6. Insert the Windows 7 installation DVD or Windows Repair CD.
      7. Restart your computer.
      8. Press any key when ‘Press any key to boot from CD or DVD’ appears
      9. Select a language, a time and currency, and a keyboard or input method, and then click ‘Next’.
      10. Click ‘Repair your computer’.
      11. Select the ‘Command Prompt’.
      12. Identify the correct drive letter for your Windows installation. It could be a drive other than C: but it won’t be X:. You do it by typing the commands‘dir C:Win*’‘dir D:Win*’‘dir E:Win*’until you find theWindows folder.(suppose found in Q drive)
      13. Type these commands:‘cd /d Q:windowsSystem32config’‘xcopy *.* Q:RegBack’‘cd RegBack’‘dir’Examine the dates of the ‘Software’, ‘System’ and ‘SAM’ files. If they were made before the problem became apparent then you can type these commands:‘Copy /y software..’‘Copy /y System..’Copy /y Sam..’(the two dots are part of each command)
      14. Restart your computer normally.
      15. If it does not work out then you can backtrack by copying the original registry files from Q:Regback to Q:WindowsSystem32config.
Footnotes:

The most serious problem is that your Windows operating system will not start at all. In that case, you need to use any external boot devices that you have available, such as any suitable floppy disk or CD-Rom that you have previously created for this purpose.

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