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Software known as “Spyware” generally tends not to intentionally harm your computer. It usually creates pathways wherein someone else aside from the computer owner can communicate with the computer. Spyware normally record various types of web sites you visit which are later used by web advertisers to allow them to send you unwanted emails and pop-ups. 

Spyware is usually frowned upon for this reason and greatly avoided. They are more intrusive than adware. Spyware have their own separate executable programs which allow them to record your keystrokes, scan files on your hard disks and look at other applications that you use including but not limited to chat programs, cookies and Web browser settings. 

The spyware then sends information it gathered to the spyware author. The agent then uses this information for advertising and marketing purposes. They even sell the information to advertisers and other parties. 

Adware, on the other hand, is a more legitimate form of freeware. Similar to spyware, adware is advertising material packaged into a software program and installed automatically once that particular program or software is added into the computer system. Other forms of adware download advertising contents as a particular application is being utilized. It is quite unfortunate that most of the adware programs take the form of spyware in that they track and report user information. 

Some signs of spyware infections include pop-up ads that seem not to be related to the site you are viewing. 

Most often, spyware pop-ups are advertisements about adult content. Also if you notice your computer slowing down, there’s a big chance that spyware and its other components have found their way in your operating system. When Windows takes longer to load, its best to scan your computer for possible spyware infections.

Viruses though are a very destructive form of software. They were purely designed and created for one purpose only! To cause havoc to your computer. They destroy whatever they come in contact with and will initiate self replication and infect as many components of the computer’s operating system or network as possible. 

These days a lot of anti-virus software provide spyware and adware scanning and removal utilities. 

Some programs, however, focus completely on locating and deleting/destroying spyware and adware programs. Whether is an anti-virus software or a anti-spyware dedicated scanner, they both search your computer and identify any spyware and virus installed on your system. 

They then remove it and their components located in the system registry among other places in your computer. It is therefore, good to regularly update your virus or spyware scanner to ensure that your computer is protected from the thousands of spyware and viruses on the internet. Never be fooled from ads that claim that their products only contain adware. 

These adware may be spyware in disguise and are just waiting to be deployed for them to gather your information. 

Learn to setup firewall systems and always use pop-up blockers to minimize computer infection and ensure the security of all your computer files.