You have one year's full Warranty with tech support. I would get troubleshooting on the phone to resolve the issue or RMA the machine.
If you haven't set it up yet, then there is no need to attempt to repair Windows 7. If you have, then you can boot into System Recovery Options
to run Startup Repair to see if it will sort the problem.
Read the Manual on the model's Support Downloads webpage to see how to run full Factory Recovery as another option, but I would want my Recovery Disks made first as a backup to running the partition (most stable way). I would also want tech support supervising so they can provide rescue media or RMA on the spot if necessary.
You can also take it back to the store to get another at this early date. Do not accept a restocking fee for a defective purchase.