What is Spyware?

Spyware is a general term for malicious software installed on your computer for the purpose of gathering and transmitting personal information without your consent. It is typically designed and implemented for commercial gain at your expense.

Spyware is frequently an unwanted component of free software, but you can also receive a spyware program from an email attachment, by visiting a deceptive web site or through file sharing. Once the software is on your computer, information about you can be collected and distributed.

Malicious hackers use spyware to gain access to your computer by creating a backdoor through which they can steal or corrupt your personal information.

>> How prevalent is spyware?