I have got Ubuntu 12.04 and want to install Windows 8. But I can't install Windows 8 as my hard disk is in FAT32 format and Windows 8 needs NTFS. I tried to format my hard disk (there are no partitions in the hard disk) but couldn't as a message appears that it is mounted.
I tried to unmount it but couldn't. Also my Software Center is not working. It opens and within seconds closes. Kindly help me. I need to install Windows 8 as soon as possible. If not Windows 8, then at least Windows 7. Thank you.