People use these three words as if they mean the same thing. They are three different criminals with three different ways of getting through your door.
People toss these three words around as if they are the same boogeyman. They are not. They are three very different criminals with three very different ways of getting in the door.
A virus needs you to help it. A worm needs no one. A Trojan tricks you into inviting it in.
A computer virus is a hitchhiker. It attaches itself to a file or a program and just sits there, harmless, until someone runs that file. Then it wakes up and spreads to other files. Like a cold making its way through an office, it travels because people keep shaking hands, opening the attachment, and passing it along without realizing it.
A worm skips the middleman entirely. It does not wait for you to click anything. It copies itself and crawls from machine to machine across a network all on its own, hunting for unlocked doors. Picture a burglar who slips into one house, then quietly unlocks every other house on the street from the inside. That self-spreading is what makes worms so fast and so nasty.
Named after the famous wooden horse, a Trojan looks like something you actually want. A free game, a handy tool, a harmless update. You welcome it in yourself, and only later does the hidden passenger climb out. The trick is not breaking in. The trick is getting you to hold the door open.
One thing to keep straight. These three are delivery methods, the how of getting in. What they drop off is usually malware, which might be ransomware locking up your files or spyware reading over your shoulder.
This is why the oldest advice still holds. Do not run files you did not expect, and be suspicious of anything that looks too generous. The horse was a gift too.
One short email: the scam making the rounds, one tech word made simple, and one tip to keep you and your family safe. Free, no spam, unsubscribe anytime. Plus a free printable "How to Spot a Scam" sheet for your fridge.
We send one email to confirm it's really you. Your address stays with us and our email service, nobody else. Privacy
The cloud isn't in the sky. It's in giant, humming, refrigerated warehouses full of computers, and they're hungry for electricity and water. Here's what a data center is.
New phones are ditching the little SIM card tray. An eSIM is the same thing, built in and programmed over the air, like a hotel updating your key card without a trip to the front desk.
Click every traffic light. Now do it again. CAPTCHAs are bouncers that keep robots out, and if you keep failing them, the problem is probably your connection, not you.
