Comment 6 for bug 697063

This is the wireless driver, you can disable it to at least get the machine to boot by pressing 'e' on the grub boot screen and editing the boot commands...

Find the 'linux' command, it should look something like this:
linux /boot/vmlinuz-2.6.32-24-generic root=UUID=c5b47225-1a42-4dd0-991c-0d883040689d ro quiet splash

There may be some other parameters in there, add the following:
rt2800pci.blacklist=yes

put it after the 'ro'

This disables the driver and allows your machine to boot.