Installation halts at installing base system.

I keep getting an error that says it is unable to install the base system. Any idea what could be causing this?

Checksum

Did you do a md5 checksum on the ISO you downloaded? Make sure the integrity of the image is ok before burning it to disk. Sound like a corrupted installer DVD

Disk partitioning?

Whenever I've encountered this message in the past... I think it's because I didn't do the "partitioning" step of the install right. Are you doing a dual boot, or a dedicated hard drive setup?