Suddenly my pc stopped working. I am getting a hal.dll error message on the screen. I am using a Windows XP Pro pc. It was working fine. There were some problems in between.The system crashed with blue screen but later on it started working properly. Last night I updated the system. I forgot to turn it off. Now there is a issue when I restart the pc. There is a problem with some missing or corrupt hal.dll file. I cannot boot in windows at all. I am having my office files in it.