I am a Materials Engineering undergraduate and looking to change my field to Computer Science and Engineering. I want to follow a PHd in Computer Science & Eng. Can i do that? Can i change my field? I hope to follow a MSc in Computer Science and then a PHd in Computer Science. Will i be allowed to do that?

Also my GPA is very low, it is around 2.6. So can i do a MSc?

Please help.:-)