Information about .sys File Extension

The CFF Explorer is a free tool designed to make PE editing as easy as possible, but without losing sight on the portable executable's internal structure. This application includes a series of tools which might help not only reverse engineers but also programmers.

PE Explorer is a feature-packed program for inspecting the inner workings of your own software, and more importantly, third party Windows applications and libraries for which you do not have source code. PE Explorer lets you open, view and edit a variety of different 32-bit Windows executable file types (also called PE files) ranging from the common, such as EXE, DLL and ActiveX Controls, to the less familiar types, such as SCR (Screensavers), CPL (Control Panel Applets), SYS, MSSTYLES, BPL, DPL and more (including executable files that run on MS Windows Mobile platform).

Dependency Walker is a free program for Microsoft Windows used to list the imported and exported functions of a portable executable file. It also displays a recursive tree of all the files it requires to work (dependencies) along with all this information.

Notepad is a simple text editor for Microsoft Windows. It has been included in all versions of Microsoft Windows.

Resource Tuner lets you view, extract, replace, edit, and delete the embedded resources of executable files: icons, strings, images, sounds, dialogs, menus - all that make up the visual part of Windows programs. In fact, it allows you to add your own custom branding to an application, change dialog messages, customize toolbar actions, and so on without having access to the actual source code. Resource Tuner offers exciting possibilities even if you aren't a programmer. It's perfect for translators, tweakers, and anyone else who wants a different look and feel for an application.

WordPad is a basic word processor that is included with almost all versions of Microsoft Windows from Windows 95 upwards. It is more advanced than Notepad but simpler than Microsoft Works Word Processor and Microsoft Word.

Adobe Reader software is the free global standard for reliably viewing, printing, and commenting on PDF documents. It can open and interact with all types of PDF content, including forms and multimedia.

Resource Hacker is a freeware utility to view, modify, rename, add, delete and extract resources in 32bit & 64bit Windows executables and resource files (*.res). It incorporates an internal resource script compiler and decompiler and works on all (Win95 - Win7) Windows operating systems.

Notepad++ is a free source code editor and Notepad replacement that supports several languages