IF you find, after installation, your sound in games is gone but desktop sound is still good...
...check the Sound properties in CP and make sure Speakers are still default (output) device - for some reason this patch alters the speakers into default *comm* device output (or similar). Once fixed sound in games is back.
Thanks for the heads up. It did mess with my sound too!
Yes, such lovely mistakes usually affect a few more people
although the KB4490481 (build 17763.404) update fixes the sound problem, it seems to cause a new problem; a BSOD "system service exception" error on some systems running Win10 v1809
Windows 10 1809 KB4490481: the missing patch arrives, finally - gHacks Tech News
Today it happened again - games no sound due to wrong default speaker setting
Updated today to .437 and hope this problem is done!?