Offer valid from 09.00 BST on 25 September 2017 to 23.59 GMT on 28 December 2017, while supplies last. Available only in Microsoft online store in UK. Not valid on prior orders or purchases; cannot be transferred or otherwise redeemed for cash or promo code(s). May not be combinable with other offers. Refunds will take into account the discount. Price discount does not include taxes, shipping or other fees. Void where prohibited or restricted by law. Microsoft reserves the right to modify or discontinue offers at any time.