Switching off flight mode

Laptop: Lenovo Flex 10, Windows 8.

Hello, I recently changed my W8 login password over my registered mobile number and email id on another computer. But the laptop is in flight mode and the f7 button isn't working. So how do I now turn off the flight mode so that the laptop knows the changed password?

Thank you.
 
OP here. When I put in the password I get the message> 'Your PC is offline. Please use the last password used on this PC.'
 
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