Can I upgrade my graphics card?

I bought this laptop about a year ago and I recently thought about buying a htc vive. I ran the steam VR test and the outcome was not really what I accpected. The test told me that I would not be able to run VR and the problem was bound to my GPU. Am I able to upgrade my GPU or not ?

My laptop is from MSI (pe70 2Qe). It has 8GB of ram, a 1 TB harddrive, a Intel core I7 processor. The current graphics card is the NVIDIA GTX 960M