Originally Posted by cherith.brook
It is a new install not a dual boot.It installed fine, but upon reboot the orange ribbon stuck at the beginning and didn't move.Advice I received on this forum was to delete "splash and quiet" fom the grub menu. When I did this I got the error 15 message.
In which case you did something wrong - just editting that shouldn't cause this error.
Simplest (prior to aus9 suggestion) might be to re-boot and select the "recovery mode" on the boot list. This does exactly
what you wanted, without the need for the edit.
See what the (last) messages indicate.