UK teacher’s Word Windows literacy tool sparks Microsoft trademark dispute

Kate McKenzie – seen holding a Word Window – says it will be difficult to change the name of her product. Photograph: Word Windows

It is one of the biggest companies in the world, valued at more than $1tn (£840bn) and feted for completely changing the face of technology in the office and the home.

But that has not stopped Microsoft from getting flustered over a small plastic reading tool created by a teacher from Northampton.