I've been having problems with the Acer Aspire Switch tablet/2-in-1. The Windows button will stop responding, also the volume buttons and power buttons behave differently when the Windows button stops working. Such as volume up causes the Ease of Access Narrator toggle on and off, which usually requires a Windows + Volume Up combo to cause. So it's like when the Windows button fails the tablet thinks it's stuck on. Volume down causes the screen to dim and the power button brings up the lock screen instead of turning it off.
Things I've tried...
I've done a factory reset of Windows.
I've installed the keyboard firmware update.
I've tried removing all the Acer software.
I've tried rebooting.
The only thing that seems to work is powering the tablet off and back on.
Oddly the same issue I'm having, I noticed the demo unit as Best Buy had the same issue.