I get a black screen after booting. I can see the power notification of Jupiter but after that there is just black screen and mouse pointer. I have enabled auto login. I saw some of the answers related to this but I can't open terminal or anything by pressing Alt+F2 or other combination. I have a dual boot with windows 8 system and I think this happened after my windows update failed.
I have installed kde over default unity in ubuntu 13.10