Bandwith usage & Checking for Virus - Downloads

Just remember that with internet or web usage, any data that transfers between the two computers adds to your 'usage' of bandwidth (up or down, ie., from your computer or to your computer). There are usually different limits for upload and download.
So if data comes to your computer for immediate viewing, it does add to your usage. The fact of storing such data on your computer makes no difference - the transfer has taken place.

With most antiviral packages you are given choices of what activities or files are protected. Read the the help files if the software is not sufficiently intuitive.
I happen to use NOD32 and that has a module called IMON which is dedicated to internet uploads and download activity.
Another module called EMON checks all emails!
Just enable what you want - I always use everything and follow the recommendations myself.

Thanks rhymer. It is good that I double checked because when I asked my Internet provider, they told me only when a file gets saved to my computer does it count for bandwith, and not when I just look at videos or listen to the songs. I was not too sure about the explanations that they gave to me, because they did not make sense.

And I am going to use the Help feature as you suggested for the anti-virus. Thanks again.