I bought a Macbook pro 13 inch 2 months ago. I have a 3G (cell c) dongle with 2 gig per month. Lately my data will just be used up very quick. Sometimes as fast as 20 mb in 30 sec without my internet or e-mail open. I have switched off my updates, but it would still use alot of data. I have found that if I restart the computer that it would work normal for a while but then it would revert back after a while. Can this be a virus? Any advice?