I purchased this computer new yesterday. Immediately after switch on it started making "gurgling" sound which has continued. This doesn't stop even when I browse the internet or watch a video. Grateful for any advice as to what I can do to get rid of it.
With a brand new PC, it could very well be doing indexing of the contents of your drive -- which is need in order to use Cortana in Win10.
That should settle down in a day or two at most.
But if it continues, you paid for free HP Tech Support as part of the warranty coverage, so you might as well make use of it.
While this PC is still under warranty, you should contact HP Customer Support directly to have them put you in touch with HP Technical Support to see what they can do about troubleshooting and repairing your machine remotely.
I did this recently and the HP Tech was able to remotely access my PC from the Internet and do the needed repairs.