Forse il sudetto Hardisk ha troppi cluster rovinati

e quindi la formattazione fallisce
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Core 2 Duo E6700@2,96GHz,

ASRock 4Coredual-Sata2, Corsair DDR2-667 (4-4-4-12) 2x1Gb, Sapphire Radeon X1950 Pro 512Mb AGP, Maxtor 250Gb Sata2 + Maxtor 160Gb Sata2, TRUST 570W Pro PSU Dual Fan.
SO
Win Vista Ultimate SP1 + Win XP SP3