Restore Disk for Sat M35 Series, Model/Part # must match the following : PSM30U-??????? (???'s can be ANY letter or number). This is a copy of the original Toshiba Recovery DVD for this model with Windows XP Home pre-installed. If you have any questions please ask before buying. You MUST provide a full model/part number and serial number with your order to verify the DVD will work with your machine, otherwise there will be no refunds for incorrect items.