|It is Ewen. He was correct.|
You don't use FDISK in dos or windows 7.
You don't have a full window installation disk then.
Boot to a live linux cd and use the partition program that comes with the distro. It may be fdisk but usually not. You should use windows 7 to format it as the ntfs version is new.
You can borrow anyone's vista or windows 7 dvd and make that. Install their disk to your system and then recover it with your disk.
Be careful that you don't need to keep a recovery partition. IN FACT that is actually what I think you need for this. When you installed linux, you deleted the recovery partition that had all the windows files. Contact the OEM to buy replacement media to recover it from scratch.
1/3 of highway deaths are caused by drunks. The rest are by people who can't drive any better than a drunk.