Power Save Mode

[SylviaL]

My Dell Windows 7 Desktop computer is showing a black screen with message
In Power Save Mode
Press any key on keyboard or move mouse

I have pressed all keys but nothing happens. What can I do to get out of save mode and back to start screen?

 

[noidea_77]

Press the power and hold it until the PC goes off. Did that happen for the first time? It might be a temporary problem, but if it happens again, come back here.