For modifying the Boot Order process and different underlying settings
To Modify the overall performance of the computer.
For increased power output.
To manage computer connections and maintain proper function.
Put the disc in and make it happen.
Install a floppy in the floppy drive and boot from it
Install an OS disc and boot from the disc (eg) Windows XP
Clone a previous hard drive to the new computer.
Begin by informing the person reporting the problem that he is the cause of the problem.
Use logic to rule out the symptoms and reach the best possible solution.
Use a diagnostic tool that will solve the problem for you.
Reinstall windows or the OS previously on the system
Change the boot order
Change setting for components
Change date time
All of the above
Here's an interesting quiz for you.