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Second System 2.4.2 Download Page (Patreon)

Published:
2026-02-22 00:17:03
Edited:
2026-02-28 02:21:02
Imported:
2026-06

Downloads

Content

This release of Second System adds a wrapper for mfplat.dll plus enhancements to the D3D11, DXGI and D3D12 runtimes. This enables support for Adobe Premiere Pro 2023 and DaVinci Resolve 20.3.1.6 on Windows 8.1. All DLL errors when running Adobe installers should be eliminated and a MSHTML wrapper has been created for Windows 7 to ensure that the installers run under IE11.Several Windows 7 users reported issues with very poor performance using the Windows 8.1 D3D11 runtime. I have made some changes to allow my supplemental runtimes to be used with original Windows Vista Platform Update and Windows 7 versions of D3D11 and DXGI, which allows these applications to run outside of "Enhanced D3D11/12 Mode". As a result, the D3D11 Enhancement Pack is now only necessary for D3D11 video acceleration and performance improvements in Kdenlive 23 and up.Updated at 2111 (UTC-5) on 2026-02-27 to fix freezing in Counter-Strike 2 on Windows 7 and add support for Adobe Premiere Pro 2023 on Windows 7, as well as Adobe Photoshop 2025 on Windows 7 and (mostly functional) Windows Vista. Any IE11-based installer on Windows 7 that did not work beforehand should work now.Windows 8.x and 10/11 releases remain unchanged.

Comments

Andrey

is Media Foundation Update 2020 that you released for the Extended Kernel needed for this release? Or is it now integrated into Second System?

kevin sahm

So I installed windows vista 64 bit ultimate on my pc and took the google chrome install from my windows 11 in a zip file and transferred it over to the vista machine put the chrome icon on my desktop tried to open it and it said this is not a valid win32 application. Doing it this way does work on xp 64 bit with one core api installed also works great on 7 with your second system installed. I also made sure to fully update vista as well.

win32

It cannot be directly integrated because the Windows 7 Media Foundation files cannot be redistributed. I am working on an improved Media Foundation enhancement pack.

win32

To 2026 updates?

Andrey

Will it allow Blair Witch to work properly on Vista?

kevin sahm

oh my bad did not go to 2026 in the vista updates I got bored today and put windows 8.1 on here and chrome works great with second system as well.

Fun95

When I run any modern Unity game I get "Failed to load il2cpp" when using the Enhanced D3D11/12 Mode. How can I fix this?

win32

How about with the regular Windows 10 compatibilty mode? The games should now work fine in D3D11 mode (cannot try D3D12 because the only D3D12 Unity game I have requires feature level 12_0; maybe I can try that after installing 8.1 on a laptop with a slightly newer GPU).

Andrey

How did you get the DX11 version of the Sims 4 to run on Vista?

win32

No special treatment was needed, just the standard Windows 10 mode. What happens when you try to run it? Any crashes (and resulting dumps)?

2LENSFLARE4U

I had this instance when trying to run CS2 using the Windows 10 and 11 modes and the game crashes upon launch. However, I noticed that when using the enhanced directx11 option, the game launched but no video output is shown. I can hear my cursor highlighting the game options and audio in the background. I notice the game video reappears every time I alt tab out of the game such as when I click play during the back screen, if I alt tab, I now see the play game section. I achieved this also by running the game from the root directory instead of running through steam. I made sure I placed the correct Windows 8.1 .dlls from a vm I created.

Andrey

I ran it in Windows 8.1 compatibility mode. Only black screen appears. Today I tried it in Windows 10 compatibility mode, and it's the same.

Andrey

I can send you a crash report to your email.

win32

I have now run this game on Windows 7 using the Windows 10 mode. There are no crashes when starting it, but it seems that with the Steam launcher in use, it tries to reject the loading of pwp_shs.dll and pws232.dll because of a patch made by the Steam launcher to ZwOpenFile that rejects them as "foreign DLLs" because they're not in system32. The only issue is a freeze on close which I will fix. Please send any crash dumps or debugging information by direct messaging. I also found a solution to the continuing mshtml issues. So they should be resolved soon.

Andrey

Were you able to find out anything?

win32

They stuffed a minidump into the XML file you provided me. The problem is that the minidump seems to be encoded or encrypted in a format that I don't recognize. I think I can work around this with a dbghelp wrapper, which I should be able to complete soon, for this and a few other applications that insist on hiding debugging information from the user and only supplying it to the mothership (Firefox does this too).

Andrey

Still, unclear how you were able to run it. And the update didn't fix it for me, but fixed other stuff.

win32

A user commented about issues getting Photoshop 2025 working on Windows 7, citing difficulties regarding the installer and dcomp.dll, but that comment was deleted. dcomp.dll will become part of the wrapper set in the next release of Second System.

Fun95

I’ve uninstalled Windows 7 shortly after but it did have an NVIDIA GPU (more specifically NVIDIA GTX 1660 Ti, iirc)

Fun95

Whatever happened to the Windows 10/11 releases? Good work as always :)

win32

None of the recent changes have affected Windows 10 and 11, so those releases weren't updated. But I did attempt to find a legitimate reason to update that version to cover the first known application to drop Windows 10 and early Windows 11, Adobe Premiere Pro 2025, but it installed on Windows 11 23H2 (24H2 is supposedly required) without incident. I will try Windows 10 22H2 when it is feasible to do so.

Fun95

I understand. Might still use this software as Windows 10 gets older overtime!