[ubuntu] Help Purple screen of death

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http://ubuntuforums.org – I use ubuntu 11.10 already 2 weeks. after copy some material to disk it is stuck. after reboot: TRY (Hd0,0):NTFS5:no wubildr TRY (Hd0,1):NTFS5:no wubildr TRY (Hd0,2):error:prefix is not set after it Purple screen of death i use 2 os windows7 and ubuntu i addition use wubi please help (Hardware)