I bought my Hp 2/14/12 and it had a free trial for 60 days, on 04/08/12 I installed a new Norton Interent Security 3 PCS disk.On 8/2212 I got an email stating "Security Alert" your security has EXPIRED there was an error 8504,104, I went to Norton websight and downloaded and ran Norton Power Eraser and followed the instructions - my computer went blank- I was able to reset to an earlier date and tried to redo my Norton, Big Mistake--lost--everything ! I tried again and reset everything to the beginning. I need help as I don't know what to try next for fear of losing everything again. Please Help.