I had to set the boot mood to Legacy from UEFI. I set the SATA from RAID to AHCI. I also slip streamed USB 3.0 drivers and the 7510 Deployment drivers. When I did all this I was able to get Windows 7 to install on the 7510 I received this week.
Download and extract the CAB drivers here:
This is the info on the USB 3.0 Slipstream:
<ADMIN NOTE: Broken link has been removed from this post by Dell>