How to open bios settings and setup in Windows 7.Also how to boot computer from CD/DVD/USB by changing the boot order in the bios.

Your computer includes a BIOS Setup utility for changing important computer settings. This document does not define specific default BIOS settings because too many differences exist between computer models. This tutorial follows the most common example, but your system may be different.

Keys to press (possibly some variation, but give these a try first):

Dell: F2
HP:F10
Acer:F2
Asus:F2
Toshiba:F2
Lenovo:F1 (or F2)

This tutorial will apply for computers, laptops, desktops, and tablets running the Windows 10, Windows 8/8.1, Windows 7 operating systems. Works for all major computer manufactures (Dell, HP, Acer, Asus, Toshiba, Lenovo, Samsung).