What's the format button for windows vista?

My new laptop is infected with a adware trojan and my norton apparently is not cleaning so I guess the only way is to format the computer but I don't know what's the button to press when I restart my Acer Laptop. Please let me know or if there's any free software that would clean it beside SD cuz it... show more My new laptop is infected with a adware trojan and my norton apparently is not cleaning so I guess the only way is to format the computer but I don't know what's the button to press when I restart my Acer Laptop. Please let me know or if there's any free software that would clean it beside SD cuz it failed too.
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