Having problems opening a SYS file?

We have programs that can open or convert your SYS files.

Opening SYS files

Did your computer fail to open a SYS file? We explain what SYS files are and recommend software that we know can open or convert your SYS files.

What is a SYS file?

Files with the .sys extension are Windows System Files. The .sys file extension was developed by the Microsoft Corporation. Files with the .sys file extension are used by the Microsoft DOS and Windows operating systems to store data about the device drivers, settings and other Windows system information on a computer.

Common SYS files include MSDOS.sys and IO.sys. Most files containing the .sys file extension are hidden by the computer's operating system.

Even though SYS files are primarily Windows files, they can be used on Mac systems that have Windows installed on them. However, a Mac computer that does not have Windows installed will not be able to run a SYS file.

Try a universal file viewer

Try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and most likely yours too. Download Free File Viewer here.

About File Extension SYS

File.org aims to be the go-to resource for file type- and related software information. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files.

If you have additional information about the SYS file format or software that uses files with the SYS suffix, please do get in touch - we would love hearing from you.