follow these steps to track what's wrong and why it is not working ....
S1: start - Run - Msconfig
S2: Select startup tab and in bottom left corner click or check disable all
S3: Select Services tab and check hide all Microsoft services and check disable all
(note: Hide all Microsoft servics should be checked before clicking disable all else your system wont boot back, before disabling check whether your ISP is listed and it should be Enabled else Internet wont work)
S4: Apply and Close
S6: Try downloading torrent file from ISO Torrent and check. If it is working disable only Mcafee and try It should probably work.