Msi gt72 2qd Dominator Igpu issues

So heres my problem. I have an MSI gt72 2qd dominator, mine is the broad well i7 5700qm model. I had to reinstall windows and now my GPH button doesnt work. I am stuck to the gtx 970 and would like to be able to switch between it and the intel integrated. Does anyone know of a fix for this?