My PC was attacked by a virus!

Yesterday my PC was attacked by 3 Trogan Horse Viruses. If and Admin are reading I should tell you it was not on NF

Thankfully the viruses were destroyed by my Anti virus system. The Trogan Horse virus is consided to be high risk and it took 4 long hours to be sure they were gone.

What is the point of people making a virus? I know thatsome people particualy Narsasists like to prove they can do stuff. But my set up is hardly NSA Security it's not some thing to brag about to your hacking friends. A psycopath would.

But there are thousands of new viruses each week and I don't know about the criminology behind net hackers other than the above.

Why do people create this garbage?