No such partition grub rescue

Ive had ubuntu set as a dual boot on my laptop for a while now, but i found out that i had a second sata port for another driver. So i deleted the ubuntu partition and extended the windows 7 one to take the whole driver. When I restarted i got an error saying “error: no such partition” How do I fix my boot record to boot windows 7 and not ubuntu? I have no window 7 CD only the recovery discs ive made.