Microsoft = Big Brother MSTask.exe

I dont know if anyone else has noticed this but lately I noticed a very sharp drop in my CPU cycles and you know why MSTask.exe is eating up all I do mean all my cycles its using on average 92% to 98% of my CPU but only when Im online does this sound alittle weird to you well it does to me so does anyone out there know what MSTask.exe is and what it does you cant end task it within Task Manager this has brought some very major concerns to my eyes although my computer is protected with multiple defenses such as a Fire Wall Secure Remote and PGP this recent activity is causing me to worry so if anyone out there knows anything about this Big Brother App please let me know