O/S Updates
Did you know that when you buy a new computer you will more than likely need to update it immediately?  Microsoft is continuely updating and improving their operating system.  Some people simpley never update their operating system.  They hate to recieve junk mail but don't realize that they may actually be contributing to the problem by having a computer that is not properly updated.  Hackers are looking for the weak link.  So don't be a weak link.  Set your computer to update automatically so you do not even have to think about it.  An updated operating system will ensure you have less computer problems than someone who doesn't update their computer.