You're very welcome.
Below is the link to the service manual for your notebook.
http://h10032.www1.hp.com/ctg/Manual/c06146792
The memory upgrade info can be found in chapter 1.
2 x 8 GB is supported.
The 'Memory is non-customer accessible/non-upgradeable' statement means that HP wants you to get the work done by an authorized service center.
If you look at the memory removal and replacement procedure found in the above manual, and you feel you can do the job yourself without breaking anything in the process, feel free to do so.
