I am admittedly a newbie to Bluetooth devices. What I didn't realize was that for my Win 10 laptop to discover the NC 700's, I had to open the Bose Music app on my iPhone, select the headphones, select the Bluetooth icon/"Source", then select "Connect New". (I assumed that because the headphones were on, they were already discoverable - wrong.) Everything worked perfectly after that. I hope this helps some other clueless dope like me.
Thank you for your post and welcome to the Bose Community.
I'm sorry if you found it difficult to establish the connection between your NC 700's and your laptop.
Just so you know, you can also put the headphones in pairing mode by holding the Power/Bluetooth button for a couple of seconds. You should hear "Ready to connect another device" and this will ensure that the headphones are in pairing mode.
I hope this helps. Do let us know if you have any questions.