Better late than never. Yesterday several RealTek drivers (HP-related) awaited download / install to my HP-15. Went through that and decided, what the heck, I'll try the restart button. It worked. I let the system come back to life and it worked again. I also have Kubuntu 14.04 (installed weeks after discovering this problem) on the same laptop and restart never worked with it as well. I tried it twice and had success each time. So far so good.
Last edited by bamashooter; 22 Jan 2016 at 06:26.
I know this is an old, old post but I searched around and couldn't find reference to what I found, so thought it may help someone else at some point.
I put win10 on an Acer Aspire 5810T, all went well apart from this black freeze screen behaviour if it was restarted, but not from a cold start. On this unit I found that either disabling one of the dual graphics items in Device Manager/Display adapters or changing BIOS, Main, Switchable graphics setting to "discrete" fix the problem.