I am having a windows xp system with me. I am facing problem with some files in it. I am not able to modify any file. I went inside folder option to find out some help on files type. But it is not working. All options are grayed out. I need some help to find solution for the problem. I am completely not able to modify any files. I am getting a error on the screen. Is this a virus issue. If yes then how to fix it back. I am having avast in my pc.