First, my computer's specs: an HP G60-635DX. I had a dual-boot setup with Ubuntu Linux on one partition, and Win7 Home Premium on another. About a week ago I was working on the attached external HD, getting rid of some partitions and deleting old data. Suddenly I started getting a grub rescue problem and I couldn't boot the computer. I couldn't figure out how to bypass the grub rescue so I ordered some Win7 installation disks from Amazon. It worked well, allowing me to install Win7, but I erroneously installed Win7 Professional instead of Home Premium, with the result that the Product Key wasn't accepted, and the disk wouldn't allow me to reinstall so I could change the OS to Home Premium. So I had the idea of installing Ubuntu and wiping the HD clean, then reinstalling Win7. Unfortunately now it won't allow me to install Win 7, since the main partition is not an NTFS partition.
That's the basic history of what I've done. My question is how do I go about changing the partition to NTFS? Do I format the HD? How do I go about this? I want to reinstall Win7 Home Premium, but I'm stymied right now.
Thanks for any help anyone can give me.