In today’s age people store a lot of sensitive data on their personal computers, such as credit card information, personal documents like birth certificates, social security cards, health information, etc. This is why you should have a in depth defense layer between your personal computer and the internet. Here are some ways listed below on how to do that.

1. Keep your software up to date: Make sure that you are running the latest version of your operating system and all the software installed on your computer. This will ensure that you have the latest security patches and fixes.
2. Use anti-virus software: Install a reputable anti-virus software on your computer and keep it up to date. The anti-virus software will protect your computer from viruses, malware, and other online threats.
3. Use a strong password: Always use a strong and unique password for your computer and all your online accounts. Avoid using the same password for multiple accounts.
4. Avoid suspicious websites: Do not visit suspicious websites or download files from unknown sources. These websites and files can contain viruses or malware that can harm your computer.
5. Use a firewall: Enable the firewall on your computer to protect it from unauthorized access. A firewall can block hackers and other online threats from accessing your computer.
6. Enable two-factor authentication: Enable two-factor authentication for your online accounts to add an extra layer of security. Two-factor authentication requires you to enter a code in addition to your password when logging in to your account.
7. Use a VPN: Consider using a VPN (Virtual Private Network) to protect your online activities from prying eyes. A VPN encrypts your internet connection and makes it difficult for anyone to monitor your online activities.

Although these are strong preventative measures from getting compromised, there will always be a risk from outsider eyes when connecting your computer to the internet or having a computer in general.