[ubuntu netbook remix] How to get into netbook's BIOS?

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http://ubuntuforums.org – Hello everyone! I want to install UNR on my netbook, but after switching it on it immediately boots Windows, not even showing BIOS info. When I press power on button, the logo of Windows appears on the black background (as usual) and starts booting it. I have no access to BIOS. How should I fix it? (Hardware)