There are a few different ways to tell if your computer is safe:

1. Keep your operating system and other software up to date. Security updates include fixes for vulnerabilities that could be exploited by hackers.
2. Install and run an antivirus program. This will help protect your computer from malware and other security threats.
3. Avoid visiting suspicious websites and downloading software from untrusted sources.
4. Be cautious when opening email attachments or clicking on links in email messages, especially from unkown users.

1. Computers have helped to improve safety in industries such as transportation by providing more accurate and timely information to pilots, conductors, and everyday drivers.
2. On the other hand, computers have also made the world less safe by increasing the potential for cyber attacks. As more and more personal and sensitive information is stored online, hackers have more opportunities to steal and misuse that information.
3. Additionally, the increasing reliance on computers and automation has also made some systems more vulnerable to failure or malfunction.
4. Another way that computers have made the world less safe is by providing a platform for the spread of misinformation and fake news. With the high demand of social media and other online platforms, it has become easier for people to spread false or misleading information, which can have serious consequences in terms of public safety and security.