SYS file format description
Many people share .sys files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .sys file can be edited, converted or printed with. On this page, we try to provide assistance for handling .sys files.
5 filename extension(s) found in our database.
.sys - Windows System Configuration
The SYS configuration files are related to Notepad. SYS is a Windows System Configuration file on Windows (msdos.sys).
- Application:
- Notepad
- Category:
- Configuration files
- Mime-type:
- text/plain
- Magic:
- - / -
- Aliases:
- -
- Windows System Configuration related extensions:
.sys - System File
SYS is a general system file.
.sys - MS-DOS System File
SYS is a 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).
.sys - Microsoft SQL Server Data Replication System Table Data
The SYS data files are related to Microsoft SQL Server. SYS file is a Microsoft SQL Server Data Replication System Table Data. Microsoft SQL Server is a relational database produced by Microsoft.
- Application:
- Microsoft SQL Server
- Category:
- Data files
- Mime-type:
- application/octet-stream
- Magic:
- - / -
- Aliases:
- -
- Microsoft SQL Server Data Replication System Table Data related extensions:
.swp - General Swap File
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.
- Application:
- -
- Category:
- Data files
- Mime-type:
- application/octet-stream
- Magic:
- - / -
- Aliases:
- sys
- General Swap File related extensions:
Naturally, other applications may also use the .sys file extension. Even harmful programs can create .sys files. Be especially cautious with .sys files coming from an unknown source!
Can't open a .sys file?
When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:
Windows can't open this 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 one from a list of programs that are installed on your computer.
To avoid this error, you need to set the file association correctly.
- Open Control Panel > Control Panel Home > Default Programs > Set Associations.
- Select a file type in the list and click Change Program.
The .sys file extension is often given incorrectly!
According to the searches on our site, these misspellings were the most common in the past year:
ys, yss, cys, xys, syz, syw, sy, sts, ss, shs, zys, eys, wys, syx, syc
Is it possible that the filename extension is misspelled?
Similar file extensions in our database:
- .ys
- Y86 Assembler Source Code
- .cys
- Clustify Summary File
- .syc
- SYSTAT Command
- .sts
- Squeak Source Code
- .ss
- Ribbons Secondary Structure
- .cys
- Cytoscape Session File
Operating systems
DataTypes.net currently supports the following operating systems:
Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android
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