Your third customer today, Lily, says her

computer won't connect to her Wi

$-$

Fi network. She

says its as if the computer can't even see the

network.

The computer uses a USB wireless network

adapter, which you confirm is securely plugged in

$.$

$$

Lily didn't bring a monitor, keyboard, or mouse,

so you plug in some of yours, using a VGA

monitor and USB for the wireless keyboard and

mouse. Lily comments how she really needs to

update her keyboard and mouse, and likes the

idea of going wireless.

After you plug up the computer and turn it on

$,$

$$

you find that it doesn't respond to the mouse.

You replace the mouse battery, but it still doesn't

respond. You then switch to an older, PS

$/$

$2$

$$

mouse, which works fine. And just as Lily said,

Windows does not detect any wireless networks

in the area, even though you know you have

three Wi

$-$

Fi networks running in your lab.

Symptoms: Windows does not detect any wireless

networks. Annoyingly, the computer also wouldn't

respond to the mouse that you know has worked

recently on other computers.

Which of the following are possible diagnoses of

the problem?

Failing hard drive

Damaged power supply

Failing motherboard

Poorly managed airflow

Electrical short in system

Outdated driver

Dusty fan