After a number of frustrations with my 17.10 upgrade I decided to to a clean install. What a difference! My icons are now clickable and I feel I am not dragging along a lot of old stuff. That said, I have a few observations and questions.
1) I am surprised by stuff that isn't in a clean install. For example, the GCC compiler.
2) Grub is installed in its own partition called grub2 core.img. Is there a reason for this?
3) At login, as well as the usual user name, there is something called "not listed". If you click on it you get asked for a password which I don't know.
4) There are certain applications which run in terminal mode (e.g. Python,GP,Sage). How can I make these "Favorites."