Symptom: I cannot toggle the sleep mode from either my keyboard shortcut or in the menu of windows 8. Both options, shutdown and restart, work perfectly fine but sleep won't work. Here is what happens when I toggle sleep: My screen shuts down but the fans still are blowing. Whenever I move my mouse or press on any peripherals the screens instantly comes back even tho I've unchecked all options allowing peripherals to wake the computer. What I've done so far: I've tried many commands on an elevated cmd window. I've check every device in "Device manager" to see if they were allowed to wake the computer and when they were, I removed them this permission. I've updated my bios to the latest version. I've tried to check out some "s1" "s2" "s3" settings in my bios but I've found nothing that would help my case. I thought that maybe fans weren't shutting down because of heat problems. But my system is water cooled always below 40 degrees Celsius, so defenitly heat is not a problem. System information (custom built): i5 4670k Corsair h75 closed loop water cooler msi oced gtx 770, twin frozr cooler msi h87-g43 motherboard Samsung 840 evo 120 gbs ssd 500gh WD hdd corsair CX750 750W corsair vengeance 8gb dual channel memory kit Windows 8 64bit Mouse: logitech g600 Keyboard: A shitty hp one Headset: logitech g430 Here are some pictures of various reports: Yeah that's pretty much all I've got, I know lots thread have been made about this but my case is very strange and uncommon. Thank you guys in advance for your help! I'll be checking this thread and try what you say about 3 times a week.