In Windows 7, one of my favorite built-in tool that can be found on Windows 7 is the System Recover Options. Any Windows 7 user enables to boot in to that environment by pressing the F8 key when starting up the computer. Upon seeing Advanced Boot Option, select Repair Your Computer and it will bring you to System Recovery Options. It allows you to easily and automatically fix problems that are preventing Windows from starting.
The System Recovery Options menu contains several tools, such as Startup Repair, that can help you recover Windows from a serious error. This set of tools is on your computer's hard disk and on the Windows installation disc. The list of options given are these:
Startup Repair – Fixes certain problems, such as missing or damaged system files, that might prevent Windows from starting correctly. For more information.
System Restore - Restores your computer's system files to an earlier point in time without affecting your files, such as e‑mail, documents, or photos.
If you use System Restore from the System Recovery Options menu, you cannot undo the restore operation. However, you can run System Restore again and choose a different restore point, if one exists.
System Image Recovery – You need to have created a system image beforehand to use this option. A system image is a personalized backup of the partition that contains Windows, and includes programs and user data, like documents, pictures, and music.
Windows Memory Diagnostic Tool – Check your computer for memory hardware errors
Command Prompt - Open a command prompt window, advanced users can use Command Prompt to perform recovery-related operations and also run other command line tools for diagnosing and troubleshooting problems.