Hi SeventSin & everyone,
Yes, everyone seems to love their Z system for its sound quality & does not want to junk it!
Since posting my comment I have contacted Logitech direct & sent them a link to this forum showing how many users are affected.
They responded quickly & asked me to carry out various tests & send them my PC system diagnostic files.
They replied asking me to update all connected drivers with latest versions: Z system, Motherboard chips drivers, Audio Drivers.
I did this to no avail: sound still stuck at one setting c. 45% max possible, & can mute, but nothing else!!!
I also tested the issue at their request on my new laptop--no difference, works, same volume problem of no variability.
I advised them yesterday of this result stating that I believe it to be Microsoft's fault because as previously stated it has worked fine for the last 10 years!.. through ALL the Window versions of: W7, W8/8.1, 10 original, 10S, W10 V1803 up to Oct 2018
v 1809 latest update where it now does NOT work. Hence, requested they tell MS it is MS's fault problem & MS should patch W10 v1809 to make it work again as it did in v1803, but hopefully that Logitech can also work with them to resolve the issue with either
or both patching their s/w to cure the problem.
>> everyone watch this space as I will update this post with any progress made. Hang in here!...
Clive-Reading, UK.