Check your download center, alot of the win10 drivers appeared today for my defiance. Just no hotkey yet.
Chassis: Defiance Series: 15.6" Matte Full HD IPS LED Widescreen (1920x1080)
1: 01_Chipset_W10.zip (20-08-2015 | 2.68mb)
2: 01_WLAN_Optional_W10.zip (20-08-2015 | 938.09mb)
3: 02_IRST_Optional_W10.zip (20-08-2015 | 11.41mb)
4: 02_VGA_W10.zip (20-08-2015 | 833.89mb)
5: 03_LAN_W10.zip (20-08-2015 | 12.45mb)
6: 03_SBX_Optional_W10.zip (20-08-2015 | 293.44mb)
7: 04_Cardreader_W10.zip (20-08-2015 | 9.11mb)
8: 04_Finger_Optional_W10.zip (20-08-2015 | 47.59mb)
9: 05_Touchpad_W10.zip (20-08-2015 | 54.37mb)
10: 06_ControlCenter_W10.zip (20-08-2015 | 201.95mb)
11: 07_AirplaneMode_W10.zip (20-08-2015 | 3.78mb)
12: 08_MEI_W10.zip (20-08-2015 | 21.02mb)
13: 09_Audio_W10.zip (20-08-2015 | 279.21mb)
Hotkey has become ControlCenter in their latest version. Just a heads up, I had to uninstall Hotkey/ControlCenter first before installing it as upgrading seems buggy for me.