hi i am in uk i have vista oem 32 bit on my pc now i am looking to go windows 7 64 bit i have just seen that you can get on the 16 july for a limited time windows 7 with no ie on it could some one clear is up for me please it is ( £49.99 pounds ) 😱 do i need a retail version of vista or 64 bit version or can i just install this on my pc thanks for your time