Ransomware attacks continued to be a major threat in 2020 and will likely remain so in 2021. Ransomware encrypts users' files and demands ransom payments for the keys to decrypt them. It often infects systems through malicious attachments or links. Signs of infection include inability to access files, browser redirection, pop-ups, and crashes. Businesses can help prevent ransomware through employee education, backups, updated software/antivirus, disaster recovery plans, and managed security services.