In all my years of PC experience, (about 31, now) I've only seen one time when Windows install would crash at the same point, time after time. In short, it was one bad memory stick.
I had to stop the install process, boot up from a Utilities CD and run Memtest on each memory stick, one at a time, till I found the bad one. It was from a company that I know puts out some real garbage.... mostly refurbished ram, using second grade chips.
One test you might do, is take out the memory sticks, clean the edge connector with a clean rag, dampened with alcohol (Denatured Alcohol is best) and then Re-Seat the ram. Then try your install again.
If you're still having problems installing Windows, and, If you have "Memtest" on a bootable CD or Flash Drive, run that on each RAM stick individually.
* If you're going to build your own systems, you should have some utilities like Memtest on a bootable disk. There are many such Utilities CD's available for download from the internet, for FREE.
Lastly, it could be that you have some piece of hardware installed in your new system that is NOT windows 7 compatible.
Good Luck (I know that problems with a brand new system can be mind blowing. I've built hundreds of systems over the past 30 years, and a piece of DOA hardware is not impossible)
Old Timer