Hi my name is ***** ***** I will be the expert working with you today to help and resolve the problem you have posted.
I am sorry to hear that you are having such trouble. I will try my best to help you out and resolve the problem as quick as possible.
do you have a Windows 7 full version operating system disk?
what is the make and model of the hdd you are trying to install windows os on and let me know the computer make and model as well.
is 1Tb supported by the motherboard bios check if the bios reads 1TB on the bios screen.
let me know.
if it recognizes then its good. save changes and exit insert the os disk and try to boot from the disk.
boot the computer tap on F8 go into the windows advance option screen let me know once you are there.
not a problem let it proceed