>> SYS file

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).

Configuration files
- / -
Windows System Configuration related extensions:
Notepad++ Data
NASA Ames Data Exchange
Android Related Readme
Nimbus 7 SAMS APRIORI Data
Microsoft Exchange Non-Delivery Report Message
BBS Directory List

.sys - System File

SYS is a general system file.

Other files
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System File related extensions:
Microsoft Crash Report
EPSi Firmware Image
Aston Shell Plug-in
CYANA Macro File
Navision Financials Database
KiXtart Script

.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).

Other files
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MS-DOS System File related extensions:
XoloX File
Harpoon 3 Registration Key File
Compressed GameCube ROM
Diff Output
Aston-Tate dBASE Database
General Cache File

.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.

Microsoft SQL Server
Data files
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Microsoft SQL Server Data Replication System Table Data related extensions:
Microsoft Baseline Security Analyser Report
IIS Smooth Streaming Publishing Point Definition
Integration Manager Database
MDAC Universal Data Link
Microsoft Robotics Developer Studio Playback Data
CLFS BaseLog

.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.

Data files
- / -
General Swap File related extensions:
LXFree XML Plot
YRC Weblink Backup Archive
MultiBit Locally Stored Blockchain
Avantrix Backup Plus Backup Data
General CADD Pro Menu
JDownloader Download Link Container

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:


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.

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:

cys, eys, sgs, shs, sjs, ss, ssy, sts, sus, sy, syc, syw, syx, syz, wys

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Y86 Assembler Source Code
MIDI System Exclusive Message
Scheme Source Code
Shell Scrap File
Clustify Summary File
SYSTAT Command

Operating systems 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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