EDIT: Having issues still. Will report back
I was unable to install the included drivers because I run windows 8 64bit. As a fix, I installed the HTC Sync software (that is actually a bitch to find, the support page for AT&T One X has no downloads section) that is found here. The install program asks that you disable Antivirus which was strange but it's most likely due to the fact that the installation downloads drivers, msmxl and Adobe Air and installs them (I guess some antivirus might detect that as trojan?).
Anyways, just figured I'd post this to any Windows 8 users that are feeling left out.
when you plug your hox into your PC via USB.. you should get the "Choose a connection type:" display. From there select "HTC Sync Manager" and you SHOULD get an auto-play type windows on your PC. Click the green icon from there and it will open a web browser to a page where you can download the HTC Sync software, which includes drivers.