How can you tell if your computer is safe?

Ways in which one can know if the computer is safe are as mentioned below:

1) Testing the settings and configuration

2) Updating the browser plugin and keeping the browser updated

3) Testing one’s firewall and making relevant setup

4) Permanently deleting the files which are not in use and are still considered sensitive

5) Installing the anti-virus and anti-malware and keeping the OS and software up to date

6) Choosing a password and protecting it

7) Not opening any unrelated or suspicious links or messages, or attachments

8) Initiating safe browsing and keeping away from pirated materials