.SYS File extension

Windows System File

.SYS File Extension - How to open .SYS File? icon
DeveloperMicrosoft
Rating
4.1(640 Votes)
CategorySystem Files
FormatText and Binary

What is a .SYS file?

A SYS file is a system file used by Microsoft DOS and Windows operating systems. It contains system settings and variables, as well as functions that are used to run the operating system. SYS files are commonly used to store device drivers and other core Windows functions.

More .SYS File Extension Information

Some examples of SYS files include the following:
  • IO.SYS: stores the default DOS device drivers and the DOS initialization program; used by DOS and Windows 9x.
  • MSDOS.SYS: contains the core operating system code for DOS, known as the DOS kernel.
  • CONFIG.SYS: contains the primary configuration information used by DOS.
System files are most commonly found within the Windows directory of a Windows installation. In particular, many SYS files are stored in the Windows\winsxs directory in later versions of Windows.

How to open .SYS files?

.SYS can be using by 2 Flatform (Mac, Windows).
And can be open by bellow programs list:
Mac
Parallels Desktop for Mac with Windows installed
Windows
Microsoft Windows
Updated at: 2018-11-13

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