Protection Updates... not fixed

Hi, I am getting a message stating  my computer is at risk.  Once I hit the "fix it" button the program runs its course and I end up with a box stating that my protection updates are not fixed.  Also, I've noticed that liveupdate runs continuously, even though it is not scheduled to run.  I have it scheduled to update only once a week but it updates constantly.   Has anyone else experienced this and have a fix for these two problems?   Thanks.