SYS File Type- The quick facts
What are SYS files and how to open them
Are you having problems opening a SYS file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.
What is a SYS file?
SYS files have multiple uses, and MS-DOS / Windows 9x System Driver is one of them.
MS-DOS / Windows 9x System Driver
Files with the .sys extension are either MS-DOS or Windows 95/98 system files.
Standard SYS files include MSDOS.SYS and IO.SYS. These files contain the core system code, and the PC running the mentioned operating systems cannot run without them.
The computer's operating system hides most files containing the .sys file extension as they are not meant to be tampered with by the user.
These files are also referred to as device drivers. Some hardware devices will install an accompanying device driver that makes the operating system detect and support said hardware, e.g., a printer or scanner.
How to open SYS files
Important: Different programs may use files with the SYS file extension for different purposes, so unless you are sure which format your SYS file is, you may need to try a few different programs.
While we have not verified the apps ourselves yet, our users have suggested 3 different SYS openers which you will find listed below.
Last updated: February 28, 2022
More file formats using the SYS extensionThrough our research of SYS files, we know that the following formats exist. However, we have not yet analyzed them in detail, and we would love to hear from you if you have information about either of them.
PlayStation 2 Icon Library
FreeDOS KEYBoard Layout Collection
Various apps that use files with this extension
These apps are known to open certain types of SYS files. Remember, different programs may use SYS files for different purposes, so you may need to try out a few of them to be able to open your specific file.