The Dell Inspiron 1525 is a notebook computer that comes with Windows XP, Windows Vista or Windows 7 preinstalled. By default, the computer is set to boot from the hard drive of the system. If the operating system is corrupt or your computer refuses to start, you may want to repair, restore or reinstall the operating system from a CD or DVD. Change the boot priority of your Inspiron 1525 so that your computer boots from the desired drive.
Restart your computer.
Press the F12 key when the Dell logo appears on the screen. The boot device menu appears.
Use the arrow keys on the keyboard to highlight the device that you want your computer to boot from.
Restart your computer. Your computer will boot from the device selected in Step 3.