Hi Aaron,
Thank you for posting your question on Microsoft Community.
After going through your post, it appears that you have an issue with downloading and installing DirectX 10.1. However, in order to guide you in the right direction; I will need some more information. Please help me by answering the questions mentioned below.
1. Did you get any error message?
2. Did you install service pack 1 on your computer?
3. Are you facing the issue while downloading or installing?
In-order to install DirectX 10.1, refer the following information.
Method 1:
Make sure that Service pack 1 installed on your computer.
To get DirectX installed, try right clicking on the install file and select "run as administrator".
Method 2:
Perform SFC scan and check the issue status.
How to use the System File Checker tool to troubleshoot missing or corrupted system files on Windows Vista or on Windows 7
http://support.microsoft.com/kb/929833
You can also refer to:
How to download and install DirectX.
http://support.microsoft.com/kb/179113
Hope this information is helpful. Please do let us know if you need assistance with Windows, we’ll be glad to assist you!