Oh, sorry, my computer's locked but I didn't do anything though.
Dude!! Why'd you yell, I was napping!!
What do I do now?
Oh no!! That looks like a malware or more specifically ransomware... Ransomware is a malware program that locks your computer and the hacker can threaten to steal your personal information in exchange for money!
OK, I will find another device
Good, next time be careful on the Internet
You will have to pay for it or you can back it up on another device.
A few minutes later...
In order to prevent this, do NOT click or fill in your personal information on random ads, spam emails, and do NOT download files from pirate websites. To further help, install a security system. Be Safe on the Internet!