The problem with the laptop is what I was referring to. If the DVD drive in it does not fully support Windows 7, it may not be able to read a Windows 7 install DVD, or it is having a problem with the way it was burned.
Beyond that, the first part of the boot expands and loads files into memory. Hopefully there is nothing wrong there.
So, starting from the cheapest to the most expensive. Reburn the .iso using something beside Nero, or burn it again at a slower speed, like 4x.
Get a flash drive and set it up to boot so you can install that way.
Last is a different DVD drive.
Someone else may have more suggestions, but hopefully one of these will take care of the problem.