As a mother, I believe in being prepared for anything that is thrown at me.  My children always amaze me and you just never know what to expect.  I feel the same way about my computer and I recently found that we had a trojan horse generic version that had somehow been installed on our computer.  I had to remove it and make sure that we did not get it again.  I did a lot of security updating and I hope that I do not have this problem again.  It is quite frustrating when you are busy and do not have the time to mess with it.