I tried installing Ubuntu (On a new computer that came with Windows 8) so I would have a system running Unix for my school assignments. I installed it using wubi.exe (this one: http://www.ubuntu.com/download/desktop/install-ubuntu-with-windows) and it didn't work correctly. I have done a little research and know what the problem is and how I should approach fixing it (I'm going to try to get it to boot from USB from now on), but I need to make sure of one thing first. I removed it by going into C:\Ubuntu\ and using the uninstall thing in that folder. When I installed it, I gave it 25GB of my hard drive. What I want to know is, did uninstalling it the way I did return that memory to Windows, or do I have to do something else? I want to make sure I'm not losing my hard drive as I fiddle around with getting this to work.
Wubi does not create actual partitions, so the space is still usable by your filesystem. You could run a Windows disk check to be sure, and also make sure Ubuntu is not in the list of installed programs.