DirectX Installation Failed

Hello. I recently encountered a problem on Windows 8 regarding DirectX driver installation for both the DirectX End-User Runtime Web Installer and the DirectX End-User Runtimes (June 2010). The files included in the installers are needed for DirectX 9.0c based applications.

Upon attempted installation of the DirectX End-User Runtime Web Installer the following error occurs: "A cabinet file necessary for installation cannot be trusted. Please verify the Cryptographic Services are enabled and the cabinet file certificate is valid."
Filename: dxwebsetup.exe

Upon attempted installation of the DirectX End-User Runtimes (June 2010) the following error occurs: "Extracting file failed. It is most likely caused by low memory (low disk space for swapping file) or corrupted Cabinet file."
Filename: directx_Jun2010_redist.exe

Even though both errors are different in their descriptions of the error I believe that the same issue is causing both. To save time answering questions back and forth:

• CryptSvc is functional at the time
• Files have attempted to be installed using the built in administrator account
• 7-zip (version 920) cannot extract the contents of "directx_Jun2010_redist.exe"
• 7-zip states that all the following files are corrupt upon attempted extraction:

June 2007, 2008, 2010 files
March 2008, 2009 files
November 2007, 2008 files
October 2005, 2006 files

• Virtual memory is fine, physical memory is fine, free space is 'spacious'
• All installations were attempted on a new Windows 8 install with the main disk isolated

Computer Specifications:
CPU: Intel Core i7 3770K
Primary HDD: Intel 520 120GB SSD
GPU: Nvidia GTX 690
RAM: 32GB DDR3 Dual Channel

So far my conclusions are either that the files are corrupt or something is going very wrong, and as far as I know, a log file has not been generated.