Where did my sound go?

[jaysus]

Recently, and for no reason I can fathom out my speakers have stopped working with a Windows 10 PC. They were connected via standard 3.5mm jack and had been working fine for years.
I've tried connecting headphones to the same 3.5mm port - no joy. Nor the one on the front of the case. I've tested both headphones and speakers elsewhere - they're working.
I can get sound either through my monitor (which has built in speakers) or connecting bluetooth headphones via a BT adapter.
I do seem to have two Digital Audio (S/PDIF} devices that appear identical in Playback Devices. When playing content only one appears to have anything coming through on the mixer.
I don't have any audio management software, just Windows. And I've tried disabling everything in playback devices - no change. I didn't make any changes (knowingly) to cause it to stop working.

Any ideas what's going on - hardware or software?

 

[jaysus]

I've tried updating drivers through Device Manager, no update.
No Realtek.
No separate sound card - motherboard audio only.

Odd. Would make sense if it was a Windows update as that might have been applied without my knowledge.

 

[jaysus]

The last driver update for my motherboard was released in 2012 (it's the one in my sig.) There was a Realtek driver for it so I've installed that and I've got sound - albeit it crackles when I adjust volume on the headphones.

Windows update break a driver maybe? I didn't have Realtek (knowingly) before - it just came up SPDIF when selecting audio sources.

 

[jaysus]

Sorry, should have replied sooner.
I installed the Realtek drivers for my mobo (dated 2012 IIRC) and it's working again. Windows does still seem like the most likely culprit but I've got sound at least now.