I am not sure wether you are here to help your friend or just vent about your problems, either way, as I said before, its likely your friend has a problem with his hard drive. Samples are just files on the drive, if they are corrupt its because there is a problem with the files themselves - absolutley nothing to do with the samplers ability. If he cannot play factory styles it means something is seriously wrong with the drive. Do him a favour and advise him to get the hard drive checked or replaced asap after which he should copy his daa back onto it.