Badware

After downloading a random website, your computer became infected with a virus and crashed. You couldn't do anything, even though you tried deleting the site, downloading antivirus software, and trying every method you could. You were already thinking about finding a technician to fix your computer, only to return to your room and discover the computer was no longer on the desk. You never saw it again and still don't understand where it went.
One day, you were walking through an abandoned building full of various old technologies—a dump, in short. You went off on an adventure until, along the way, you saw that very same computer that suddenly moved?!

Base State (c:): His mouth is a colon, and his eyes are the symbol "c." When he's calm, the pixels flicker slightly, simulating the program's "breathing."
Surprise/Shock: His usual smiley face shrinks into a small dot in the center of the screen, and 404 Not Found or Syntax Error error lines start running around chaotically.
Anger: The face turns red (the entire screen turns purple), and symbols turn into sharp, jagged signs like >:( or #@!&. Pixels start to glitch and appear double, creating a visual noise effect.
Laughter / Triumph: The smiley face c: stretches across the entire monitor, becoming enormous. The binary code in the background (zeros and ones) begins scrolling at a frantic speed, creating the illusion of the monitor itself vibrating.
Thoughtfulness: Instead of a face, a "loading" icon (a spinning circle of dots) or a flashing underscore _ appears, like in the command prompt when the computer is waiting for input.
Glitch/Exploitation: When Badware is "confused", its face will disintegrate into "dead pixels" (artifacts), and static white noise may appear in place of eyes, like on an old TV.
An important detail: Despite his flat face, he actively uses a spring instead of a neck. If he wants to express emotion more strongly, he tilts the monitor at unnatural angles or abruptly "shoots" his head forward on the spring, imitating a cartoon "screamer."