BSOD While Using Utorrent problem with the file NETIO.sys

I am using a Dell Inspiron 15R(5520) with Windows Home Premium x 64 Bit.I got my system recently serviced because of some USB Port Problems. Since then My system is getting BSOD.It is a 2 month old system The only softwares i have installed are google chrome, Km Player and U torrent. One Norton Security scan toolbar got installed. While Getting BSOD, the blue screen showed that the problem...