I have had this problem with Windows 10 since the being of my testing of both the 32 and 64 bit windows guests (Beta testing with pre-release).. The Linux hosts seem to work well, however I use the ICH AC97 audio for them... So the problem may be with the Intel HD Audio simulator (or windows driver)... I did not have problems with the Windows 7 guest machine)
I hope this can be addressed... or does someone have a Windows 10 (both 32 and 64 bit) driver for the ICH AC97 emulation???
Cheers
Andy
I am currently running Virtualbox 5.0.4 with the up-to-date extensions..
PS: Thank you for fixing the problem with the 3D Video.... It really has helped!