This question already has an answer here:
I have a usb with my windows ISO loaded and ready. Problem is there is no ntfs partition on my hard drive for windows to load onto. I don't want to complicate things by running 2 operating systems. I’d like to go back to windows. I like Ubuntu more but I have no clue what I’m doing. I’m not a programmer.
I’ve tried booting from my usb with windows 7 loaded on as well as a CD with vista ultimate. Neither gave me an option to repair my drive. Both have the option to delete partition, and the CD gave me the option to format partition. The formatting failed and I’m afraid to delete the partition because I don't know what to do if I delete Ubuntu and the drive remains in ext4 format. Please help.