While software and security updates can often seem like an annoyance, it really is important to stay on top of them. Aside from adding extra features, they often cover security holes. This means the provider of the operating system (OS) or software has found vulnerabilities which give hackers the opportunity to compromise the program or even your entire computer.

 2.Have your wits about you

It should go without saying, being suspicious is one of the best things you can do to keep your computer secure. Admittedly, with hacker techniques becoming increasingly sophisticated, it can be difficult to tell when you’re under attack. All it takes is one email open or link click, and your computer could be compromised.
 Enable a firewall

3. A firewall acts as a barrier between your computer or network and the internet. It effectively closes the computer ports that prevent communication with your device. This protects your computer by stopping threats from entering the system and spreading between devices. It can also help prevent your data leaving your compute

4. Adjust your browser settings

Most browsers have options that enable you to adjust the level of privacy and security while you browse. These can help lower the risk of malware infections reaching your computer and malicious hackers attacking your device. Some browsers even enable you to tell websites not to track your movements by blocking cookies.
5. Install antivirus and anti-spyware software

Any machine connected to the internet is inherently vulnerable to viruses and other threats, including malware, ransomware, and Trojan attacks. An antivirus software isn’t a completely foolproof option but it can definitely help. There are free options out there, but they’re limited, and besides, the paid programs won’t set you back a whole lot. Bitdefender, is a popular option that I recommend. For alternatives take a look at this data backed comparison of antivirus.

6. Password protect your software and lock your device

Most web-connected software that you install on your system requires login credentials. The most important thing here is not to use the same password across all applications. This makes it far too easy for someone to hack into all of your accounts and possibly steal your identity.

7. Encrypt your data

Whether your computer houses your life’s work or a load of files with sentimental value like photos and videos, it’s likely worth protecting that information. One way to ensure it doesn’t fall into the wrong hands is to encrypt your data. Encrypted data will require resources to decrypt it; this alone might be enough to deter a hacker from pursuing action.

8. Use a VPN

A Virtual Private Network (VPN) is an excellent way to step up your security, especially when browsing online. While using a VPN, all of your internet traffic is encrypted and tunneled through an intermediary server in a separate location. This masks your IP, replacing it with a different one, so that your ISP can no longer monitor your activity