Ransomware primarily does what to a user's computer system?

Ransomware primarily restricts access to a user's computer system until a ransom is paid. This type of malicious software encrypts the files on the infected device, rendering them inaccessible to the user. The attackers then demand payment, often in cryptocurrency, in exchange for the decryption key that would restore access to the user's own data. This method effectively holds the user's digital property hostage, as they cannot access their files or systems without complying with the ransom demand.

The other options do not accurately describe the primary function of ransomware. While ransomware can cause a computer system to slow down due to the encryption processes it initiates, slowing performance is a byproduct rather than its main purpose. Unlike security updates or measures, ransomware does not enhance security; instead, it exploits vulnerabilities for malicious gain. Additionally, ransomware does not facilitate software updates; its focus is on extortion through file access restriction rather than improving system functionality.