Ok I have an HP Spectre XT 15 touchsmart with IDT high definition audio drivers with beats. Recently when installing 10051 build. My sound and video would play fine then after a little bit my sound would start to slow down,crackle and lag. The video...
Read more: http://www.neowin.net/news/windows-10-build-10051-has-new-mail-and-calendar-apps
See also:
Windows 10 build 10051: A closer look at the new Mail app
Windows 10 10051: A closer look at the new calendar app
One of the things that I hate about new OS's is digging up a list of new changes, and 9879 is no different. I found this comprehensive page showing most of the changes made to Windows 10. Enjoy! ;)
http://studio384.be/w10/