The most practical advice we can offer you is: By installing these files, you install the malware. One common trick is to offer you a seemingly useful free game or utility, which unknown to you, also includes a virus or trojan. You might be tricked into installing it yourself, but sometimes they can self-install just by visiting a malicious website. Malware usually gets onto your PC from infected files you download from websites or open as email attachments.
Collectively referred to as 'Malware', malicious software such as viruses, trojans and spyware are software programs which are designed to cause damage to a computer system or to your privacy.
