Has anyone examined closely whether certain security software is not “battery friendly” when running on a notebook? I recently installed TF and my battery life seems to have been cut noticeably. It may not be caused by TF but I noticed is has a lot of disk i/o writes and wondered if that may be contributing to my problem. Other HIPS programs seem to have a lot of disk reads, others use some CPU. The bottom line is what security software has the biggest impact on battery life? I realize this post may need to be moved.