Windows 10 64bit suddenly will not sleep.

About a week ago I noticed that my desktop wasn't sleeping after 30
minutes, the screen did go into standby after 20 minutes, it will sleep
if I use the sleep button on the keyboard.

I have Googled until my fingers hurt trying all the suggestions but
can't got it working.

powercfg requests gives -

SYSTEM:
[DRIVER] High Definition Audio Device
(HDAUDIO\FUNC_01&VEN_10EC&DEV_0892&SUBSYS_1458A102 &REV_1003\4&b0b129f&0&0001)

An audio stream is currently in use.

I've looked this up and tried the many fixes, non of which work.

It's now time to swallow my pride and ask for help.

Windows 10 64bit, (latest updates), NVIDIA GeForce GT 430 video card
(drivers up to date), 1TB SSD Samsung C: drive.

Any help appreciated.

Mike

--
Michael Swift We do not regard Englishmen as foreigners.
Kirkheaton We look on them only as rather mad Norwegians.
Yorkshire Halvard Lange