File Extension Library

.SYS File Extension

  • Developer by: Microsoft
  • Category: System Files
  • Format: Text and Binary

What are .SYS files and how to open them?

Can't open .SYS file? Are you wondering what it contains? On our site we will explain to you what this file is, what it is used for and what software opens the .SYS file.

What is a .SYS file extension?

.SYS file extension is created by Microsoft. .SYS has been classified as System Files. The format of .SYS file is Text and Binary.

.SYS is Windows System 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.

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.

List of all softwares that can open the Windows System File
Microsoft Windows
Parallels Desktop for Mac with Windows installed
File Type 2 Motorola Driver File
Developer by: Motorola Category: System Files

Device driver used by Motorola cell phones; allows the phone to communicate with computer and transfer files to and from the device; typically installed with the software installation CD included with the cell phone.

Example Motorola driver files include the "m56pci.sys" device controller and the "p2k.sys" file, which enables the P2Kman program to upload and download files from Motorola Vxxx cell phones.

How to fix problems with .SYS files

  1. You need to update the application that you normally use to open .SYS files. Only the latest version of the software supports the current .SYS file format
  2. You need to check the .SYS file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)