Don't worry as I'll be glad to help, After reading your post, I did go through the Product specifications of your product and found that you have 8 GB DDR4-3200 SDRAM (2 x 4 GB) installed on the PC. And your computer supports up to 32 GB maximum system memory.
Thanks for you reply, I had already seen the Product specifications. However, the Manual at http://h10032.www1.hp.com/ctg/Manual/c06446633 refers to Model numbers 15-ec0xxx, 15z-ec000 which does not appear to include model specified unless I am reading it wrong.
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