Introduction

VxKex is a set of API extensions for Windows 7 that allow some Windows 8, 8.1 and 10-exclusive applications to run on Windows 7.

To download and install, see the releases page.

After installation, usage is easy: just right click on a program (.exe or .msi), open the Properties dialog, and select the VxKex tab. Then, check the check box which says "Enable VxKex for this program", and try to run the program.

VxKex configuration GUI

Some programs require additional configuration. There's a file called "Application Compatibility List.docx" inside the VxKex installation folder (which is C:Program FilesVxKex by default) which details these steps, but for the most part, all configuration is self-explanatory.

If you are a developer, source code is provided as a 7z file on the releases page.

FAQ

Q: Does it work for games???

A: At the moment, VxKex is not intended for games, so you will probably have limited success. I hope to address this shortcoming in a future release.

Q: What applications are supported?

A: The list of compatible applications includes, but is not limited to:

Bespoke Synth
Blender
Blockbench
Calibre
Chromium (including Ungoogled Chromium)
Citra
Commander Wars
Cygwin
Dasel
Discord Canary
ElectronMail
Firefox
GIMP (2.99.18)
GitHub Desktop
HandBrake
Kodi
MKVToolNix
MongoDB
MPC-Qt
MPV
MPV.NET
Opera
osu!lazer
Python
qBittorrent
QMMP
Qt Creator
Rufus
Steel Bank Common Lisp
Spotify
Steinberg SpectraLayers
TeamTalk
VSCode and VSCodium
WinDbg (classic from Windows 11 SDK, and preview)
Yuzu (gameplay was not tested)
Zig

See the Application Compatibility List.docx file, which is installed together with VxKex, for more information.

The majority of Qt6 applications will work, and many Electron applications will work as well.

Q: Does VxKex modify system files? Will it make my system unstable?

A: VxKex does not modify any system files. Its effect on the whole system is extremely minimal. No background services are used, no global hooks are installed, and the shell extensions and DLLs that are loaded have minimal impact and can be disabled if needed. You can rest assured that your Windows 7 will remain as stable as it always is.

Q: Do I need to have specific updates installed?

A: VxKex is only designed to work with Service Pack 1 installed. Users of Windows 7 RTM can try to use it, but I don't know if it will install or work. Many programs require KB2533623 and KB2670838 in order to run. It is a good idea to install those two updates.

Q: If I have ESUs (Extended Security Updates) installed, can I use VxKex?

A: Yes. There is no problem with ESUs.

Q: Do console applications work with VxKex?

A: Yes. After you have enabled VxKex for a program you can use it through the command prompt as normal.

Q: Can I use this with Windows 8 or 8.1?

A: VxKex is designed for use only with Windows 7. If you use Windows 8 or 8.1, it's unlikely that VxKex will do anything useful, but you're free to install it anyway and see what happens.

Q: How does VxKex work?

A: VxKex works by loading a DLL into each program where VxKex is enabled. This is accomplished through using the IFEO (Image File Execution Options) registry key.

Specifically, the "VerifierDlls" value is set to point to a VxKex DLL. This DLL then loads into the process.

API extension is accomplished by editing the program's DLL import table so that instead of importing from Windows 8/8.1/10 DLLs, it imports to VxKex DLLs instead. These VxKex DLLs contain implementations of Windows API functions which were introduced in newer versions of Windows.