Restore Disk for Sat A25 Series, Model/Part # must match the following : PSA20U-?????? (???'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 no refunds will be given for incorrect items. Please visit our new store at http://restorecd4u.com for an expanded selection.