I have been unable to play any games on Steam because as part of the installation process, they all install DirectX 9. I have done multiple clean installs of Win11, run all Steam install attempts as admin, have tried to manually install DirectX using the DXSETUP executable that comes with Steam's _commondistr package, I have tried using the webupdate utility and have downloaded and tried to install using the standalone version. All result in some variation of the same set of errors listed in the DXerror log:
[07/07/24 11:41:49] module: dxupdate(Mar 30 2011), file: dxupdate.cpp, line: 1094, function: CabCallback
SPFILENOTIFY\_FILEEXTRACTED: error = 13.
[07/07/24 11:41:49] module: dxupdate(Mar 30 2011), file: dxupdate.cpp, line: 5689, function: DirectXUpdateInstallPlugIn
Failed API: SetupIterateCabinet()
Error: (13) - The data is invalid.
Unable to iterate through E:\SteamLibrary\steamapps\common\Zenimax Online\\_CommonRedist\DirectX\Jun2010\Apr2007\_d3dx9\_33\_x64.cab. The file may be damaged.
[07/07/24 11:41:49] module: dsetup32(Mar 30 2011), file: dxupdate.cpp, line: 280, function: CSetup::InstallPlugIn
DirectXUpdateInstallPlugIn() failed.
Note that leading up to this failure, ALL cabs in the download are listed as "trusted", but that the actual attempt to install them errors out on the very first one it tries to install. I've read a very large number of forum posts (both here and on various help forums) and all seem to loop in a circle for me: Download the install package and install it manually. This, obviously, doesn't work and I'm at a loss as to why this is occuring. I'll reiterate that this happens when nothing else has been installed on a new Win11 install, outside of OS, .NET and hardware driver updates. I've taken the GPU out of the machine just to see if that might be a cause, and I've attached the monitor using the motherboard's imbedded video card.
In case this helps, here are my specs:
Windows 11 (Build 22631.3810)
Intel i9-13900K
64Gb RAM
Asus ROG Maximus Hero Z790 mobo (flashed to most updated version several reinstalls ago)
Please, can someone help me because I'm kinda at my wit's end here.