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Computer-Toshiba P200-140 using vista 32bit home edition Have installed vista using the backup disc supplied when the unit was bought. Installation went ok but on bootup from harddrive the system stops showing four white/black horizontal bars on the bottom of the sreen. Repeated operations gave the same results.Tried xp pro system which worked fine ,only required additional drivers Reverted back to vista with xp removed and result as above. Any help appreciated.