How to solve the problem above?
I want to install Windows 7 on my computer but while installing Ubuntu I erased all data and now I don't have NTFS partition to install windows. I have a single sda1 of 490GB extended to 4.1GB of sda2. I have tried GParted and Disks to completely format the hard disk but it is not unmounting.
Please help me to create a NTFS primary partition to install windows. How can I solve this problem?