Viruses: Understanding the Problem

Computer viruses are malicious programs designed to damage, disrupt, or gain unauthorized access to systems. They spread through email attachments, downloads, infected websites, and removable media.

Types of Viruses

• Trojan: Disguised as legitimate software but carries malware.
• Ransomware: Encrypts files and demands payment for decryption.
• Spyware: Secretly monitors activities and collects personal data.
• Worms: Self-replicating viruses that spread across networks.
• Adware: Displays unwanted ads and can track behavior.

How Viruses Spread

• Opening infected email attachments.
• Downloading software from untrusted sources.
• Clicking malicious links on websites or social media.
• Using compromised USB drives or external media.

Notable Virus Cases

• ILOVEYOU Virus (2000): Affected millions of computers worldwide.
• WannaCry Ransomware (2017): Global ransomware attack affecting thousands of organizations.
• Stuxnet (2010): Targeted industrial control systems.
• Zeus Trojan (2007): Targeted banking information worldwide.

Consequences of Viruses

• Loss of sensitive information.
• System downtime and productivity loss.
• Financial losses from ransomware or theft.
• Reputation damage for individuals or businesses.

Prevention & Support

• Install antivirus software and keep it updated.
• Regularly update your operating system and software.
• Avoid downloading files or clicking links from unknown sources.
• Backup important files regularly.
• Report virus incidents to authorities: Uganda Cybercrime Office