If you had got your IRDA QIRU2 unit without any Primera LX400 driver CD or the latter is lost, you may choose to follow the links below. Without a special IRDA QIRU2 driver to your unit, you won’t be able to use all its Noname functionality. The basic Primera LX400 driver from Windows is only able to support the minimum GeForce4 A250 set thereof. You are really in need of a fully-featured authentic Primera LX400 driver.
For IRDA QIRU2 download, please just follow the Pixma MP190 link.