All of these changes are optional, and do not need to be carried out. Instead, they are offered as suggestions to try to lower the time it takes for Windows to boot. Some of these changes are very advanced and should only be attempted if you are comfortable with making the changes and have your data backed up.
System BIOS Changes
One of the first places to help speed boot time in Windows is to make some simple changes to the system BIOS. The BIOS or Basic Input/Output System is a set of instructions and commands built into the motherboard that allows the computer to know what type of hardware is connected and how to communicate with that hardware. You'll first have to gain access to the BIOS setup screen to make any changes. Do not make changes to the system settings in the BIOS lightly, one mistake can render the computer unbootable and cause more problems than its worth. For this reason, do not attempt making changes to the system BIOS unless you are willing to accept the risk along with it. With that said, you'll want to follow the directions below and make some simple changes to speed up the boot process.
1) You must start with the computer completely off, not in sleep or hibernation mode. Then turn the computer on.
2) Enter the system BIOS screen by the manufacturers suggestion. Depending on the computer, this may involve pressing the DEL key, pressing F1, Pressing F10, holding down CTRL-ALT-S, or a variety of other keystrokes to get to the BIOS screen. For a more complete list of keystrokes to enter the BIOS screen, visit Michael Steven's page on the subject.
3) Once in the BIOS setup, look for a BOOT menu and select it with your keyboard arrow keys, Tab, and Enter.
4) In most modern BIOS screens, you'll find an option for Quick Boot. Enable this to skip memory tests and other minor Power On Self Tests (POST).

5) Find an option for Boot Device Priority next, and change the first boot device to be the hard drive. Changing this option will speed up the boot process, but it will also not allow the computer to boot from a floppy disk or CD-ROM. If booting from anything other than the hard drive is important to you, please skip this step. If later on, you need to boot from a CD-ROM, simply re-enter the BIOS setup and make the CD-ROM the first boot device.

6) Choose the option to Exit and Save Changes and the computer will reboot.
There are other options in the BIOS to speed up boot time such as choosing the exact settings for your hard drive, and disabling AUTO DETECT of hard drives and other media. However I am skipping those changes and leaving them for a later discussion.




