Comment 14 for bug 195905

If you are still experiencing this I would need (and extremely quickly if you want it fixed before release):

* You have to uninstall and reinstall (make sure to use a release-candidate ISO or later)
* You have to choose verbose mode (at reboot, after "Ubuntu", press "esc", and select verbose mode.
* Post your windows username (I am interested whether any special char is in there)
* Attach c:\ubuntu\install\custom-installation\preseed.cfg
* When installation stops press ctrl+alt+f2 and run: sudo sh /custom-installation/hooks/failure-command.sh
* Attach c:\ubuntu\installation-logs.zip