.SYS File Extension

File Type:
Windows System File

Having trouble opening .sys extension? Don't panic! This page explains what sys files are as well as suggests programs you may use to open sys files. You can download these programs through this page.

What is a SYS file?

Sys file extension has Windows System file type, developed by Microsoft, which is associated with the "system files" category.

Associated with Windows OS and Microsoft DOS, the system file stores system settings, functions, and variables. The file may be also used for saving device drivers as well as some of the other Windows functions. SYS files are typically located inside the Windows directory within a Windows installation.

To learn how you can open the given file, read the information below.

sys file icon
File Type:
Windows System File
System Files
Text and Binary

How to open SYS file?

Double click the sys file to open it. The file will open automatically if file associations have been correctly installed and there is a proper program on your computer; if not, file associations may be corrupted and your OS either cannot find the proper program, or you might not have one for opening the file. First, we recommend downloading our utility to fix file association errors; then, you can download any program for opening the .sys extension from the ones suggested below. If you are certain there is nothing wrong with the file associations, you may proceed to method 2 right away; besides, if you can't make up your mind when choosing the right program, use Universal File Viewer from the last method.

Method 1: Fix file association errors

Follow these steps in order to automatically fix the sys extension associations' problem in no time:

  • Step 1: Click on "Download Solution" to download automatic tool provided by WikiExt.
  • Step 2: Click "Start Scan" to identify all potential issues.
  • Step 3: Review scan results and click "Fix Items".

File Size: 3.04 MB, Download time: < 1 min. on DSL/ADSL/Cable

This Tool is Compatible With: Windows XP, Vista, 7, 8/8.1, 10

Method 2: Download the appropriate software

The given list provides programs which may be used for opening or converting the sys file. Choose the proper program for your OS, and click it to start the download or proceed to the developer's website.

Programs that open SYS files

Method 3: Use universal file viewer

In addition to the list of programs above, we recommend using Universal File Viewer. This tool can open over 250 file extensions and, most likely, it will be able to open the sys file as well. Download Universal File Viewer for your OS.

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