It’s impossible to declare your computer is safe and secure from every malicious virus and malware even after thrill cleaning up of its component system. This is simply because even using all available mechanisms and system detection tools, chances are you can only understand and analyze your systems weaknesses only from vulnerabilities already known. If there is zero day vulnerability in your computer for example, it can easily pass-by undetected by the anti-virus in the computer systems. With this in mind however, there are some measures in place to tell if a computer is secure and safe.

   Once a virus enters to your computer, it replicates and cause program damages, file deletion and alteration and even erasing entire hard drive. Therefore, to check a computer safety, it is necessary to start with the basics of computer health awareness, looking things like slow performance, problems shutting down and starting, missing files and documents, frequent error messages, pop-ups, appearance of newly downloaded application tool bars, overworked hard drive whirring, browser lag and anti-virus and firewall programs malfunction. These can serve as a gateway or indications that further look ups are necessary to tell whether the device will need some more especial anti-virus or any other security features to keep it safe.

  Confirming if your computer security system is up to date is other way that you can stay safe. Virus and threat protection which protects device against threat, firewall and network protection which protects who and what can access the computer network, app and browser control, which protects the computer from malicious and potentially unwanted apps, files and websites are security systems which need a regular updates in order to keep programs patched when there is any bugs which needs a patch.  

  In your computer system task manager can guide and tell also about what programs are taking much of your computer’s CPU, memory and generally resource capacity, which is help in looking up programs with a potential virus or malware.