No, because this is 32-bit software only, sorry! You can check whether your computer is 32 or 64 bit by knowing how much RAM there is. Anything more than 4 GBs and its 64 bit. Anything less and its 32 bit.
Yes, it is the FULL OS. The only pre-requisite is that your computer already be running windows XP or 98 or even Vista already, but I don't know why you would buy another.