Windows® 8.1 Default Product Keys (OEM預設安裝KEY 備忘錄), Windows 8.1 Q37NV-YH8QQ-VTHM8-6VDRJ-MTB8Q; Windows 8.1 N 8PYDW-RNGJ3-DPVKY-T9RC8-DGMDW; Windows 8.1 Pro ...