I haven't ever used the Windows installer, so I unfortunately can't help you too much. I have the same computer though, and it wouldn't boot because of the b43 firmware.
The solution was to blacklist the b43 module via GRUB and then install the
firmware-b43-installer once Ubuntu is loaded. (More information here)
According to the WubiGuide, here is how to edit the GRUB command line options on wubi installs:
For grub errors, immediately after reboot, press [INSERT] rapidly after selecting Wubi and/or press [ESC] at the countdown after selecting "Ubuntu" and use [C] or [E] to enter the appropriate boot options manually
What you should do:
- Use the above directions, then enter in
b43.blacklist=yes and press
CTRL+X to boot.
sudo apt-get install firmware-b43-installer
- Reboot and you should have a working system with wireless.
Note: I haven't tried this so post a comment if something doesn't work quite right.