This is the mother of all errors. BSOD or bluescreen errors are displayed when your operating system has encountered a critical system error The causes of these errors is limitless but some of the main reasons include faulty memory, dodgy device drivers a corrupt Registry, or incompatible DLLs. These errors are either fatal or important enough that they require immediate action. If the error message says something along the lines of "Wait for window or press any key (or Ctrl+Alt+Delete) to reboot," then reboot. You can wait especially if you feel that you can fix the problem or the problem will fix itself. Some software had help scan through your PC and detect the problem. If no action is done more da to your PC could be on its way. Stop errors are similiar but with out the blue screen. Listed below are the most common of these errors. Select on error name to find out more details and possible repair.