Unable to install DirectX - All Games not loading from Steam

[MattGoldrick]

So, out of nowhere, only about half of my games on Steam launch correctly. I ran through a bunch of scenarios and finally narrowed it down to (hopefully) DirectX not being installed correctly. The only problem there is that I can't get it to install. Here's the error log that I keep getting. Keep in mind that I'm at the edge of my computer experience right now :

[06/07/18 02:08:11] module: dxupdate(Mar 30 2011), file: dxupdate.cpp, line: 2187, function: ExecuteCab
Failed API: SetupIterateCabinet()
Error: (5) - Access is denied.
Unable to iterate through C:\Users\Matt\AppData\Local\Temp\DX2828.tmp\MDX_1.0.2910.0_x86.cab. The file may be damaged.
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[06/07/18 02:08:12] module: dxupdate(Mar 30 2011), file: dxupdate.cpp, line: 5776, function: DirectXUpdateInstallPlugIn
ExecuteCab() failed.
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[06/07/18 02:09:19] module: dxupdate(Mar 30 2011), file: dxupdate.cpp, line: 2234, function: RegisterDLL
Failed API: LoadLibraryEx()
Error: (193) - %1 is not a valid Win32 application.
Unable to load C:\WINDOWS\system32\XAudio2_7.dll.
--------------------
[06/07/18 02:09:19] module: dxupdate(Mar 30 2011), file: dxupdate.cpp, line: 5861, function: DirectXUpdateInstallPlugIn
RegisterDllFromSection() failed.
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[06/07/18 02:09:19] module: dsetup32(Mar 30 2011), file: dxupdate.cpp, line: 280, function: CSetup::InstallPlugIn
DirectXUpdateInstallPlugIn() failed.
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[06/07/18 02:09:19] module: dsetup32(Mar 30 2011), file: setup.cpp, line: 1727, function: CSetup::SetupForDirectX
InstallPlugIn() failed.

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