Dualbooting with windows

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http://askubuntu.com – Since I´m getting more and more into linux I got the idea that I should start dualbooting on the family laptop. First I downloaded wubi to dualboot Ubuntu with Windows 7 home premium on an Acer Aspire laptop. Then I restarted and looked forward for Ubuntu but the screen is almost black. I can barely see some ad about "excellent apps" but not enough to be able to do anything about it. Beside being a newbie and computerlexic, what´s my issue? Thanks in advance! (HowTos)