I'm sorry to hear that you've had a tough time getting towards the Drivers that you need. I'm not sure why you would need to make an account of any kind, you're welcome to give us a chat on Live Chat, or send us an email across, or even a quick call and we'd be able to go over and offer help.
I've been unable to locate the N1725 on our stock system currently, which is a little strange but completely fine. You'll find a black sticker on the bottom of the Laptop, this should give you some information on the unit itself, as well as a possible Chassis number (likely in the top right of the sticker).
Failing that, you may also be able to find a Serial Number that starts with a 7, and ends with a Dash and three numbers either on the bottom of the unit, or likely inside the battery compartment.
You're welcome to either direct message me the picture of the sticker if you're stuck, or the serial number and I'll be able to help further.