There are a few steps that one must implement in order to keep yourr computer secure. A few of these steps are:
Implement a 2-way or multi-factor authentication
Use uncommon alphanumeric passwords and secure them
Update your computer regularly
Install a good antivirus to protect your computer from malware
Have a specialized firewall to keep attacks at a minimum
Have anti-phishing software installed to identify fraudulent mails
Use encryption to reduce data leakage and loss
Finally, it is very crucial to secure your DNS