I have reduced the Windows C drive partition by 60 Gig and now have a 60 Gig unusable partition.. While trying to install Ubuntu 12.04 (from a DVD received at the last installfest) I get a message about no Root file system defined. The partitions look like this. /dev/sda /dev/sda1 ntfs 208 mb /dev/sda2 ntfs 171245 mb unusable 60000 mb /dev/sda3 ntfs 18494 mb /dev/sda4 fat32 108 mb How do I define a root file system? TIA George -- Success builds confidence. Failure builds knowledge.