Windows blue screens are actually error message display on Windows operating systems. These are colloquially referred to as the - Windows blue screens of death - because the error that the screen displays is usually a fatal system error, which requires a complete overhaul of the software. Windows blue screens can be caused by several problems, including data error from abrupt power loss, an illegal operation happening on the computer (such as those performed by viruses), or DLL errors, which are most common of all. Blue screens happen only in the rarest of situations, but when it does, it has to be treated seriously even if the computer restarts after the blue screen. Not getting the computer inspected can lead to more serious problems in the future.

DLL Errors

DLL, or downloadable link libraries, contain shared information that allow several systems or tasks to function in the computer. When these DLL files are moved, removed, or accidentally altered, a DLL error message is displayed, or the computer may even fail to boot properly. Common causes of DLL errors are:

• Deleting of a shared DLL file when a program is un-installed.
• Overwriting of existing DLL file from updated drivers.
• Hardware concerns, such as low disk space, low ram, or BIOS settings.
• System problems on everything from system registry to documents to hive files.
• Software defect due to pirated copy, viruses, etc.

When un-installing a program, make sure to include - do not delete shared DLL files - in the settings. Update hardware with higher memory and RAM capabilities. Download a secure and through antivirus program. A registry cleaner that will run up a startup can automatically detect DLL errors and other things so that these will be fixed even before the problem starts.

Even the most advanced computer users can feel anxiety and stress when he gets to encounter any of the blue screens or DLL error messages. It's a good idea to always have a separate hard drive where personal files can be stored. That way, these files will not be deleted once the system really needs to be reinstalled.