Hi, im currently using MS office that came from Windows7, im sure its trial, but i dont know which version are my currently version, how do we know what version that we have?? reffering to my MS feature, i guess i have MS office proffesional, and yesterday i just bought MS office Home and student, can i enter Home and student key license for my current MS office (seems to be Proffesional ver.) ?? if we cant, what should i do then, should i uninstall my current MS office version then Install the Home student version?