Are you using a burned disc or an original disc from Microsoft? If you have burned an ISO onto a disc, you might have a poor quality blank dvd or one that was burned poorly/too fast, and the drive is having a hard time reading it.
If that isn’t the case, then its probably problems with the SATA drivers included in the setup portion of the installation disc. You might have to change the SATA settings in the bios from AHCI to IDE mode. This is not optimal, and if you were installing on an SSD instead of the 2TB HDD, it would not work properly, but in this case, it might help.
One last thing to try if you have access to another computer is to switch to a USB stick for installation instead of the optical disc. You can extract an ISO from the disc onto the hard drive of this other computer and make a bootable USB installation drive. You would need to change settings in the bios to enable [B]your[/B] computer to boot from USB media when you try to install the operating system.
You can make an ISO from the original disc using ImgBurn. Just choose Create Image File from Disc. Then follow the instructions here for making a USB installation drive from a USB stick that is 4gb or larger: http://www.sevenforums.com/tutorials/31541-windows-7-usb-dvd-download-tool.html