Windows 7 Professional PC hangs at "Loading files" when trying to boot with custom capture image on Windows Deployment Services.

I have created a custom capture image in WDS. Now when I try to boot my reference PC into this image the PC hangs at "Loading files". The reference PC is running Windows 7 and I am using Windows Server 2012 Standard on my server.

I have followed the instructions on how to create the custom capture image on the server to a fault. I PXE boot the PC and it shows the capture images after I hit F12. The problem is that it starts to boot and then hangs about 2/3 way through the progress bar.

Any help would be appreciated.