[wubi] Wubi problems

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http://ubuntuforums.org – i have a Toshiba satellite c855d-s5307. it came preinstalled with windows 8. i have since then "upgraded" to windows 7 in CSM boot mode and installed Wubi. after about 5 minutes or so Wubi freezes up or the wifi disconnects. and restart is the only option. when i tried to install from usb/dvd it will not detect windows and shows the entire hard drive blank. really not sure were i can go from this point. i have to have it ready to use by monday. (Hardware)