HP ENVY TouchSmart m6-k025dx Sleekbook (Best Buy version, Intel i5, full HD display) . Windows 8 (64- bit) installed.
Updating to Windows 8.1install failed repeatedly (like many others report, screen blanks part way through driver % ) . Eventually made it work by unplugging the ethernet cable & setting airplane mode before the installation began.
After that, was able to install all the recommended HP updates as of 26-Dec-13. Was able to install all Windows updates exceptkb2903939 . When that one is installed, the touchsmart freezes (crashes? ...) on reboot.
Hope this info helpful to someone!
Happy holidays!