Filename Extensions
If you are seeking information about file extensions, then you are in the right place at right time.

Details of extension .sys

4 extension(s) and 1 alias(es) in our database

Below, you can find answers to the following questions:

  • What is the .sys file?
  • Which program can create the .sys file?
  • Where can you find a description of the .sys format?
  • What can convert .sys files to a different format?
  • Which MIME-type is associated with the .sys extension?
.sys
Windows System Configuration .sys file icon

Windows System Configuration

SYS is a Windows System Configuration file on Windows (msdos.sys).
Category: Configuration files
Application: Notepad
Program name: notepad.exe
Mime-type: text/plain
Magic bytes (HEX): -
Magic string (ASCII): -
Aliases:
-
Links:
-
Related extensions:
Microsoft Windows 95 Clean Boot File
General Configuration
Initialization File
MS-DOS Subsystem Startup File
.sys
System File .sys file icon

System File

The SYS file is a general system file.
Detailed description not available
Category: Other files
Application: -
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Aliases:
-
Links:
-
Related extensions:
Autodesk AutoCAD Heidi Information File
Autodesk AutoCAD Heidi Device Interface
Compressed SYS File
.sys
MS-DOS System File .sys file icon

MS-DOS System File

The SYS file is an MS-DOS System file (msdos.sys, io.sys). IO.SYS contains the default MS-DOS device drivers and the DOS initialization program. MSDOS.SYS is run after IO.SYS and contains the core operating system code for DOS (the DOS kernel).
Category: Other files
Application: -
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Aliases:
-
Links:
-
Related extensions:
MS-DOS Batch File
Windows Command File
Executable File
Renamed MS-DOS System File
MS-DOS Subsystem Startup File
MS-DOS Overlay Data
MS-DOS 7.0 System File
MS-DOS Shell Menu Group Data
MS-DOS Shell Menu
.sys
Microsoft SQL Server Data Replication System Table Data .sys file icon

Microsoft SQL Server Data Replication System Table Data

The SYS file is a Microsoft SQL Server Data Replication System Table Data. Microsoft SQL Server is a relational database produced by Microsoft.
Category: Data files
Application: Microsoft SQL Server
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Aliases:
-
Links:
-
Related extensions:
Aston-Tate dBASE Database
SQR Script
SQL Script
Embarcadero InterBase Database File
RBase Data
General Database File
SQR Portable Format
SQR Printer Output
Pervasive SQL Database
.swp
General Swap File .swp file icon

General Swap File

The SWP file is a General Swap File. Windows Swap file is a disk file used by Windows for its virtual memory. A virtual memory system temporarily stores segments of the application on disk when there is not enough memory to hold all the programs called for.
Detailed description not available
Category: Data files
Application: -
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Aliases:
sys
Links:
Related extensions:
General History File

Other types of files may also use the .sys file extension. If you have helpful information about .sys extension, write to us!

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

Clustify Summary File
Sierra Expanded Embroidery Format Document
Sansgui Schema Definition File
Shell Scrap File
SimCity 3000 Custom Buildings File
Ribbons Secondary Structure
IBM Rational SDL Suite Diagram
Nimbus 7 SAMS Status Data
SAP Transactionware GM POS Xpress Suspended Data

The .sys filename extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

syc (1), sus (1), ssy (1), sjs (1), sgs (1), yss (1), cys (1), xys (1), syz (1), syw (1), sy (1), sts (1), ss (1), shs (1), zys (1)

Can't open a .sys file?

If you want to open a .sys file on your computer, you just need to have the appropriate program installed. If the .sys association isn't set correctly, you may receive the following error message:

Windows can't open this file:

File: example.sys

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select from a list of programs that are installed on your computer.

To change file associations:

  • Right-click a file with the extension whose association you want to change, and then click Open With.
  • In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want.
  • Select the Always use the selected program to open this kind of file check box.

Supported operating systems

Windows Server 2003/2008/2012/2016, Windows 7, Windows 8, Windows 10, Linux, FreeBSD, NetBSD, OpenBSD, Mac OS X, iOS, Android