File type: Windows System
What is a SYS File
The SYS extension is used mostly on Windows and MS-DOS platforms by SYStem. Generally, the files with the SYS extension contain executable codes for most hardware device drivers, such as the 1394bus.sys.
These SYS files and documents execute on kernel-mode. This is the highest possible privilege for Microsoft Windows systems.
This only means that errors or loopholes can cause great damage to the documents and in worst cases; errors may lead to data loss.
How to Open SYS Files
As this type is similar to text there are not specific programs to view them. However, you can use classic text editors like notepad in windows or Vi in Linux.