This is a known issue, and is expected to be remedied as Windows 10 emerges.
However, you could either do the unplug/plug of the power connector, or run this command with PowerShell (Admin):
powercfg -h off
Fixed it for me.
However, you could either do the unplug/plug of the power connector, or run this command with PowerShell (Admin):
powercfg -h off
Fixed it for me.