Ensuring the safety of your computer involves several key practices and indicators. First, regularly updating your operating system and software is crucial as updates often include patches for security vulnerabilities. Next, installing and maintaining reliable antivirus software can protect against malware and other threats. Additionally, using strong, unique passwords for different accounts and enabling two-factor authentication adds extra layers of security. Monitoring for unusual activity, such as unexpected slowdowns, strange pop-ups, or unknown programs running in the background, can also signal potential security issues. Finally, regularly backing up important data ensures that you can recover your files in case of a security breach.

Computers have significantly impacted global safety in various ways. First, they enhance cybersecurity through advanced encryption techniques and security protocols, which protect sensitive data from unauthorized access and cyberattacks. For instance, financial institutions use encryption to secure online transactions, safeguarding personal and financial information. Second, computers play a crucial role in emergency response systems. They enable real-time communication and coordination among emergency services, improving the efficiency and effectiveness of responses to natural disasters, medical emergencies, and other crises. Technologies like GPS and data analytics help in quickly locating and assisting those in need. Third, computers have revolutionized surveillance and monitoring systems. Advanced software and hardware solutions allow for continuous monitoring of critical infrastructure, public spaces, and borders, thereby preventing and responding to potential threats more effectively.

However, computers also introduce new risks. First, they are a target for cybercriminals who exploit vulnerabilities to commit identity theft, financial fraud, and other crimes. Massive data breaches have exposed personal information of millions, leading to financial loss and privacy concerns. Second, the proliferation of cyber warfare capabilities poses significant threats to national security. State-sponsored hackers can disrupt critical infrastructure, such as power grids and communication networks, potentially causing widespread chaos and harm. Third, the spread of misinformation and harmful content through digital platforms can incite violence, influence elections, and destabilize societies. The anonymity and rapid dissemination capabilities of the internet make it challenging to control and mitigate these threats.

In summary, while computers have made significant strides in improving safety through cybersecurity, emergency response, and surveillance, they also present new vulnerabilities that must be managed to ensure a safer digital and physical world.