Ransomware is a lethal kind of Malware that Encrypts your harddrive(s) and holds them hostage, providing the decryption key if you pay the hostage-taker(s) money (well-known variants are the FBI Virus and the Police Virus).
Ransomeware (malware variant), once infected with, holds your system (mostly harddrive(s) and/or storage media) hostage by either encrypting the info, or holding an OS hostage (non-encryption ransomware).
Questions aksed with this tag should have information concidering ransomware, having a system infected with Ransomware, having questions on preventing ransomware, etc.
For more information, please see these sites explaining ransomeware, its definitions, history, and more:
