Malware accesses the user’s device through the internet, email, hacked websites, game demos, music files, toolbars, software, free subscriptions, or anything else you download from the internet on a device that is not protected with anti-malware software.
How to recognize malware.
A slow computer is a sign that your device might be infected with malware, as are pop-ups, spam, and frequent crashes. You can use a malware scanner to check if your device is infected.
How to remove malware.
The best way to get rid of malware is to use a reliable malware removal tool, such as the one you can find in good anti-malware software.
How to avoid malware.
Use antivirus and antimalware software. • Do not open email attachments from unknown or unexpected sources.
Source: https://www.avast.com/es-es/c-malware
At Itera we can help you. Contact a specialist: seguridad@it-web.ciomprix.com