New win. 10 install, no audio output. device installed.

Eagle51 said:

Hmm ... No RealTek HD Audio Manager in Control Panel ?

If you haven't already, check BIOS to see if sound is enable and in Device Manager / View / Show Hidden Devices to see if you see any warnings. If no issues there, try going to Settings / Update & Security / Troubleshoot / Playing Audio and run it.

Nope no audio manager in the control panel.
Already ran the troubleshoot several times.
How do I get into the BIOS?

Seeing four NVIDIA HD audio devices isn't unusual. But those are from the graphics card. NVIDIA unlikely to use Realtek's drivers.

I see lots of variants of the HP Pavillion 6100 (could you be more specific?). You could have onboard as well that's not detected by Windows (could be disabled in BIOS).

When you first boot the machine and the HP flash screen appears, it should show you the function key to press to enter Setup Menu (that's BIOS). Usually F10 for HP. Start tapping as machine powers on. If it gets past the HP flash screen, you missed your chance to get into BIOS. Shutdown and start again. Look for onboard / integrated audio option. Make sure it's not disabled.

Well thanks for the advice everyone, I schlepped my machine back to the shop that did the upgrade,they corrected the sound problem in less than an hour.
I'll be sure to drop in if I have more questions later, or just to see if I can help with anything.

TV2 said:

Did they tell you what they did?

I think they turned off the auto protect in my Norton, to get the realtek driver to start.
I checked everything when I got home, they had turned it off while it was in the shop.