Tina's father called her to say that a message suddenly appeared on his screen that says his software license has expired and he must immediately pay $500 to have it renewed before control of the computer will be returned to him. What type of malware is this?

Ransomware

Explanation:

The type of malware that has attacked Tina's father computer is called Ransomware, more specifically it is known as blocking Ransomware.

Ransomware is a types of malware that block a user from having access to his/her computer until a ransom is paid. It could occur through downloading or clicking of malicious link.