Booting from USB Windows or MAC
Occasionally, if you solve your PC or install a new operating system, you need “boot from a disk” or a USB flash drive. That’s what it means, and how.
When the power button on the computer that boots from its internal hard drive where the (usually Windows, OS X or Linux) operating system is stored are pressed. But sometimes you have to start something different. Maybe you need to boot from the Windows installation disk to reinstall Windows, or maybe you need to boot from a rescue disk system to solve a computer problem. When prompted to boot from a CD or USB key, this is what you should do.
On a Windows PC
Every Windows PC is different, but once you enter the boot menu for the system should be able to find what they are looking for. To boot from a CD or USB:
- Restart the computer and wait for the first screen display. They often say something like “Press F12 to select boot device” somewhere on the screen. Pressing this key now.
- Give it a moment to continue the boot, and you should see a popup menu with a list of options in it. Select the CD or USB and press Enter.
Alternatively, you can set your computer to always check for a CD or USB. Thus, when they are inserted, it will automatically start from, and when it does, will address in its regular operating system. To do this, follow these instructions:
- Restart the computer and find the first screen that appears when you start. You should see something that says “Press DEL to enter setup” or something similar. Press the key indicated on the keyboard and wait for the configuration to boot.
You should see a new pop-up screen, called BIOS. This is where a large number of low-level settings for your computer is configured. Look through the options (being careful not to change anything) for a setting called “boot device”, “Boot order” or something similar. Select this option.
- In the menu that appears, select the hard drive and press Enter on your computer. If you try to boot from a USB stick, USB-HDD chooses the place and press Enter. Depending on your BIOS, you may need to use the arrow keys page up and page down to move the selection to the top of the list instead.
- Get out of your BIOS, save the changes. Usually, this option is “Exit” in the main, or available through a menu shortcut that appears somewhere on the screen.
- Your computer must be restarted. Make sure your CD or USB on your computer. If you are prompted to “Press any key to boot from the CD / DVD” do. The computer should boot from the CD or USB memory instead of your normal operating system.
- From here you can follow the instructions on the screen to install Windows, solve problems, or do whatever you have to do.
On a Mac
Booting from CD or USB is very, very easy on a Mac All you need to do is.:
Restart the computer. When the first demonstrations of the white screen and start ringing are heard, hold down the “Option” key.
You should see a list of disks appear. On the right, is the CD or USB, which appears with your name underneath. Use the arrow keys or mouse to highlight the drive and press Enter or click the down arrow.
From there, the computer boots from the CD or USB drive instead of Mac OS X, and you can do what you have to do following the instructions on the screen.
It is a fairly simple process once you get used to it, and that can be extremely useful if you take care of your computer into your own hands.