Can someone please explain in detail how a Trojan is downloaded on a computer secretly?

I'm studying computer security and it is of interest to me, seeing as it's happened to me before. Please DO NOT tell me antivirus software names or the like.

Can someone please explain in detail how a Trojan is downloaded on a computer secretly?computer security

Spywares are spread either by piggybacking on a piece of

desirable software or by tricking the computer user into

installing them.

Some ''rogue'' anti-spyware programs even masquerade as

security software.

Spyware can also come bundled with shareware or other

downloadable computer software.

http://homebizseo.com/Computers/Spyware_...

Can someone please explain in detail how a Trojan is downloaded on a computer secretly?free spyware remobal

A Trojan is a virus or malware that's ''hiding'' inside a legit program (or a program that LOOKS legit). It's got to be downloaded by a user, then it goes to town.

That's why it's called a Trojan - look up the classic story about the Trojan Horse.
just by visiting certain wibsites can download viruses behind your back.
usually they are downloaded in the form of cookies and then convert when they install.
There are several methods that can load a trojan onto your computer.