I run a 64-bit windows 8 laptop. I have tried both the 12.04.4 and 13.1 ISO files. I use the Universal USB Installer here http://www.pendrivelinux.com/universal-usb-installer-easy-as-1-2-3/. when I try to install Ubuntu onto my flash drive it runs smoothly until it extracting files using 7-zip. Immediately an error box appears below the progress bar saying "0 can not open output file G:\autorun.inf". if i let it extract to 99% then close, and let the rest install normally, I can't boot Ubuntu at all.