Your Dell desktop computer will come with all of the equipment you need to hook it up and get it started right in the box with the main CPU. You will have all of the peripheral equipment and cables that you need to connect your desktop to your keyboard, mouse, monitor and, most importantly, a wall outlet or surge protector to provide it with power. The entire hookup process shouldn't take more than a few minutes.
Connect your computer monitor to your Dell computer using the included blue VGA cable. This VGA cable plugs into the blue video input on the back of your Dell computer and into the identical input on the back of your monitor.
Plug your monitor's attached power cable into a wall outlet or surge protector.
Plug in your keyboard and mouse. Dell computers ship with USB keyboards and mice, so take the USB cables that are permanently connected to each device and plug each of them into one of the available USB ports on the back of your Dell computer. You can use the ports on the front of your computer if you like, but as your keyboard and mouse don't get unplugged with any kind of frequency you may want to conserve those inputs for removable devices like flash drives.
Connect your Dell computer to a wall outlet or surge protector using the included power cable. The power cable plugs into the power outlet on the back of your Dell computer and into a regular power outlet on a compatible device.
Press "Power" on your Dell computer as well as on your monitor. Your computer will turn on and begin to boot into Windows.