How can i unlock my asus laptop

[sheann]

Hello,
My Asus laptop has locked on U-tube as tried to enlarge screen and have nothing, the screen is on but blank and I cannot shut the computer off?

 

[Emerald]

hit F8 as if you want to go into Save Mode; however, there should be an option to boot Windows with VGA

 

[vk_87]

Keep the power button pressed of any computer pressed for 5+ seconds to do a force shut down.