Hi ChimerePants31, = Problem fixer!
Also, FLV-84, Veddermandis = other users for whom it has worked!
ChimePants31-your English was brilliant-easily understandable.
Your solution WORKS =Brilliant all Z users will be very grateful!!!!!
I set the music going on Itunes at 45% volume, only volume setting working, then took your nuclear option! & pulled the power plug out of the sub-woofer.
Waited a few mins for electrics to clear, plugged in again-no sound at all > very scared but used my brain & told myself
"REBOOT", as IT always told me do back in W95 times!...., as it fixed many PC problems.
Post Reboot: Brilliant everything works again: full sound variability on everything; r/c, Z Volume keypad icon, taskbar vol slider.
Sound blasts out at full volume now, if I need it, but mostly 50%-60% is great.
Hence, I will now tell Logitech so that they can publish this solution on their web-site.
Bit disappointed with them as they have not replied yet to my last e-mail to them last Sat Jan 19th telling them to work with MS to fix it!
Hopefully this solution reaches all Z users everywhere.
Clive-Reading UK.