If it happens to you that you are not able to open the drives by double click, then your system may be infected with virus. When this virus infects your windows, it automatically creates a autorun.inf in the root directory of each drive. This autorun.inf file is usually hidden, read only and is a system file. This virus also disables folder option. This is not a major problem and can be fixed by deleting autorun.inf file.
Follow the steps below to fix this problem :