Re: install on desktop with windows 7 loader on
What you described happens when there are already four primary partitions, or three primary partition and one extended partition that is full. No more partitions can be created. Anyway, it's a safe guess because it happens all the time. You can look at the results of sudo fdisk -l in Ubuntu, or look at the partition layout in the Disk Management utility of Windows 7. You can post the fdisk report or a screenshot of the Windows utility if you need more help.