Malware is an abbreviation for “malicious software” and used as a name to refer to virus, spyware, worm, and other things that can cause damage to your computer. The term malware is used to refer to a program that is harmful to your computer.
Spyware is a type of program that is installed with or without your permission on your personal computer to collect information about you, the computer or your browsing habits. It can track everything you do without your knowledge and send it to a remote user. It also can download other malicious programs from internet and install it on your computer.
A Virus is a program written to enter to your computer and damage or alter your files. A virus might corrupt or delete data on your computer. Viruses can also replicate themselves.Viruses can enter to your computer as an attachment of images, documents, or audio / video files. Viruses also enter through downloads on the Internet. They are sometimes hidden in a free softwares or other files that you can download.
A Cookie is a plain text file that is stored on your computer in a cookies folder that stores data about your browsing sessions. Cookies are used by many websites to track visitor information. A tracking cookie is a cookie which keeps track of your browsing information and this is used by hackers and companies to know all your personal details like bank account details, your credit card information etc.. It’s a good practice to clear your cookies often.