Viruses also known as worms?

How do u get rid of it and where does it come from? And what is spyware and adware

Viruses also known as worms?husqvarna

worms:

A worm is a malicious self-replicating computer program designed to infect multiple remote computers in attempt to deliver a destructive payload. A typical worm spreads by e-mail, in file sharing networks or through unprotected network shares. Widely spread complex parasites usually propagate themselves by exploiting certain security vulnerabilities in the targeted remote system. Most worms can infect and corrupt files, degrade overall system performance and security, steal user sensitive information or install other dangerous parasites such as backdoors or trojans. Worms are very similar to regular computer viruses and therefore can have different malicious functionality.

adware:

Adware is any computer program that displays advertisements while the application is running. Advertisements appear in a web browser, pop-up windows, special toolbars or within the host program. Adware also can gather information about user鈥檚 habits and interests and send it out through a background Internet connection. Such behavior allows adware vendors to deliver targeted advertisements to the end user and collect general statistics.

Adware is divided into parasitical and legitimate applications. Illegal advertising programs are very similar to spyware parasites and often have some of their functions. They can be installed without explicit user consent and work all the time a computer is on. However, they are less dangerous, because most of such parasites are primarily intended to collect user鈥檚 personal information for marketing and advertising, but not for criminal purposes.