I have an emachines computer with windows xp. I went to restart my computer and it kept saying windows is shutting down but it never did. I had to hold down the power button until it shut off. Now when I turn my computer on I get this message: self test check your pc and signal cable monitor is working The whole time this is displayed my processor is constantly running. This has happened before and it was a few days later before I was able to get on my computer again. Has anyone ever had this problem? Or does anyone know what I can do to fix it?