I'm just gonna paste the post I wrote in r/TechSupport
When Windows 10 rolled out, I upgraded to it on my Dell XPS 8700. (Core i5 4???, 8GB RAM, GT720 1GB). It had some bugs, but the worst ones were one involving random freezing and one in which, if the computer put the display into power saving mode or went to sleep on its own, it would refuse to wake it up. I reinstalled Windows 7 after a month- it needed a clean install anyway. A year later, around the anniversary update, I bought an ASUS ROG GL552 laptop (i7 6700HQ, 16GB RAM, 2GB GTX660M) preloaded with Windows 10 (though curiously with a C:\Windows.old on the image). Fewer bugs here, some issues with system programs using full resources but I ironed them out. However, the issue persisted. If I put the computer to sleep manually, I could wake it up fine. If I closed the lid or left it be until the screen turned off and/or it went to sleep, the computer would not reawaken. The only solution was a workaround that wasted both time and battery; it would hibernate on lid close, or else leave the screen on indefinitely. Some have stated it's a bug with NVidia drivers/firmware/hardware. However, I was writing a paper on a library computer (Optiplex 9020: i7 4790, 16GB RAM, R5 240) got up for a minute, and returned to find the displays in power saving mode. Only the secondary would awaken; the primary just got a black screen until I forced a restart. Can I at least fix this on my own computer? There are numerous accounts of this happening across several makes of computer, but Microsoft will barely even acknowledge the problem.