Spams are Stupid Pointless Annoying Messages and they can infect your computer by like... say this guy tells you that you have 44 minutes to do this blah blah blah if you dont blah blah blah after you done press F6......and that is how you can really get viruses.
most of them are spams
They can get you if your password is leaked, from torrents and spams. I suggest you need to get advanced system care.
The infect your computer by being undetected by your anti virus and posing as a harmless file.
No.
infect it
Yes, any thing that contains software and connects to your computer, that is infected, can and will infect it
Get yourself a good antivirus.
Virus and worms.
You can tell by the viruses and spyware that infect your computer
"Yes, all computer security are vulnerable to risks like the Trojan and other computer viruses or spams. If you want to protect your computer, you need to buy antivirus soft-wares."
If a virus was burned to the DVD, then yes, this can infect a computer.
Adware can be spread from the second it's on your computer just by being there. Because it is on your computer, it can secretely infect every program on your computer, allowing it to infect everything in the system once you open one of the infected programs.