I have created 6 different USB sticks with different versions of Ubuntu and using different creator software (such as Unetbootin, Ubuntu's startup disk creator and others). In all cases the installer hangs on the Ubuntu logo splash screen. This is true whether I try to "try it" or "install it". If I hit ESC at that screen I see this message:
The disk contains an unclean file system (0, 1).
The file system wasn't safely closed on Windows. Fixing.
No matter how long I wait (e.g., overnight), it stays right there and does not proceed.
I do not care about Windows. I just want to install Linux.
In my testing I have tried versions of Ubuntu from 10.04 to 14.04.1. All have exactly the same issue so that lets me rule out any problem with either a specific usb stick or a version of Ubuntu. I made some of the USB sticks on different computers too.