My 4.1 surround home theater system sounds like 2.1 in windows 10


Oct 13, 2016
Hello everyone,
My PC specs
Core i3 4150
GTX 750ti
Asus h81
Onboard sound card

Coming straight my 4.1 surround system sounds like 2.1 the front left and back left sound at same time
And front right and back right sound the same.when i change the setting to 4.1 in realtek audio manager the front right and left sound but the back speakers doesn't sound at all I tried it in windows control panel but still no luck anyways I use windows 10
Upgraded from windows 8.1 . It used to work in windows 8.1
Please can I get help