Here is how to use the installation disc to run System Recovery Options to fix problems.Be sure that the DVD you are using is for the same edition of Windows 7 genuie that you are trying to repair – for example, Windows 7 Home Premium, 64-bit or a 32-bit.There is a full installation disc can be used for repair even if you have an Original equipment manufacturer. here is No product key is required in this process.Just follow the below steps:-
STEP 1 : Put the disc in your Floppy Disk or an optical Drive and restart to boot from the DVD/CD.Here You may have to change the boot settings in your BIOS(basic input/output system) if booting from a CD/DVD is not enabled.
STEP 2 : After that,On the"Install Windows" screen,After You have to select for language,your time zone, and keyboard, and then click "Next".
STEP 3: On the next screen, click "Repair Your Computer".Be care Dont click "Install now".
STEP 4: In "System Recovery Options",select which operating system you want to restore if any are listed. It will be blank in many systems with only one operating system you select.
STEP 5 : Click on the "Next" Button.
STEP 6 : The "System Recovery Options" screen Below.
STEP 7 : Select "Startup Repair" or select any option.