Malware is known as Malicious software or any program that conveys harm to a PC framework. It can be as worms, infections, trojans, spyware, adware, and rootkits, ransomware and so on. Which steal protected data information, erase records or add program not approved by a user. It was initially made as experiments and pranks however eventually prompted vandalism and destruction of targeted machines. Today, quite a bit of It is made for benefits through advertising promoting (adware), taking delicate data (spyware), spreading email spam or child pornography (zombie PCs), or to coerce cash (ransomware). Different elements can make PCs more powerless against malware attacks, incorporating defects in the working framework configuration, having the majority of the PCs on a system run a similar OS, giving users many permissions or simply using the Windows OS (due to its popularity, it gets the most malware written for it ).
Today many experts believe the amount of malicious program being released on the web might actually surpass the release of the valid software.

 Types of malware 

Software such as anti-virus and firewalls are used to protect against activity identified as malicious and to recover from attacks.