This is a Acer computer I am posting on, but this happened (I think) sometime in May. This problem is that it first hangs at a black screen for a long time, shows the bootscreen, runs CHKDSK, then does the same thing over and over. They put the computer monitor up and put the case in my room. (Yes, I am a tech 100%, as you can see by my username.) I do not know what caused this problem. HP Recovery did not work, it lagged when it was gonna run the Microsoft System Restore. What exactly causes this problem on an HP machine? Anyways, the edition is Home Premium. Service pack, I do not know. Whatever is causing the problem, tell me. The computer has the browsers Firefox and IE. It is mainly used by one of our people in our family, Eddie, for him to download pictures and watch YouTube videos. He sometimes opens stuff from his history. I am sure his life without a computer would be bad. He has like 100's of pictures on there!