Gabriel's sister called him about a message that suddenly appeared on her screen that says her software license has expired and she must immediately pay $500 to have it renewed before control of the computer will be returned to her. What type of malware has infected her computer

Blocking ransomware

Explanation:

A ransomware is a malware that acts by encrypting the files of a victim after which the attacker demands for a ransom payment to be made by the victim before access is restored through the provision of a key to decrypt the encrypted files

There are different types of ransomware such as blockers, wipers and cryptors

A blocker ransomware is one that blocks access to the files stored on a computer or device by encrypting them and usually displaying a demand for payment message that comes up in front of the all opened windows