Hi Marcos,
If you look up "virus protect" in google it will tell you how to get rid of it.
With the sound you will have to find out what sound card you have and download the driver off the internet.
Just google "sound card name + driver" and you should find it.
Goodluck
If you have problems I always find googling it, you should find a solution as it probably happened to 1000's of people beforehand.
