I have a Lenovo ideapad g580 with Windows 8 from the box.
When I insert a USB stick with Ubuntu 12.10 64-bit, it is just giving me to try it, not to run it from the USB.
When I put it on my other laptop it is just running and I can save data and files, and when I shutdown the laptop the data aren't deleted.
And on the Lenovo when I work on Ubuntu, all the data after restarting the system are deleted.