Hi Tim
I have similar problem, when I connect only keyboard, or only mouse then everything’s fine. When I connect both at the same time, keyboard is loosing connection. I tried disabling ‘allow computer to turn off this device’, but it didn’t help. I tried ‘Bluetooth collaboration’, wifi works fine, but keyboard still loosing connection, types multiple characters and so…
I tried to connect both to another computer with Windows 8 (64) and it works all fine. So it must be driver (I noticed different version HID on Win8), or it’s our CHUWI…
