I installed through Wubi, and after restarting and choosing Ubuntu, I get a purple screen

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http://askubuntu.com – Two lines appear and disappear too quickly to read when booting, followed by a blank purple screen that takes up most, but not all, of my monitor. It just hangs there. I have no idea how to fix this. Holding shift during boot successfully takes me into boot options (normal and recovery mode), and I can get into Grub, but I'm not sure what to change to successfully boot into Ubuntu. I've installed Ubuntu through the Windows 7 64-bit Wubi installer. (HowTos)