### Comment:
How does ransomware encrypt files on a victim's computer?

### REPLY:
Ransomware encrypts files on a victim's computer by first gaining unauthorized access to the system. Once inside, it uses a complex encryption algorithm to lock the files, making them inaccessible to the user. The encryption key is then sent to the attacker's command and control server. The attacker then demands a ransom from the victim in exchange for the decryption key. It is crucial to regularly update security patches and employ strong security measures to prevent ransomware attacks.