Ok so my master harddrive (C drive, the harddisk where windows is installed) is running low on space. I have a slave harddrive (D drive) which is basically empty and used for storing backup files etc but has no windows installed in it. I was wondering would an application work if I installed it in my D drive such as a game like COD 2? I would upgrade if it weren't a laptop which brings me on to another question, can I upgrade my laptop and put a new hard disk in it? My laptop is new (bought it last month), its a dell Inspiron 9400.