Literally every time I use the Dash Home it causes my computer to freeze up and become useless, until I restart it. It's a shame because I can't really look through my apps or anything using it, and it is shown off to be Ubuntu's best features. This issue has plagued me since day 1 of using Ubuntu. I'm not sure what causes it myself, from what the website says Ubuntu runs pretty well on most computers and laptops and my computer is what I believe to be pretty capable. Just for some reason it cannot handle opening the dash home, as if it requires my computer to work as hard as it can, but it's best isn't good enough so it just quits. Also, when I first started using Ubuntu a few months ago I was using 12.10, then yesterday I went ahead and upgraded to using 13.04. I was hoping doing this would solve the Dash home crash because it is said that Ringtail is more stable. But actually this didn't help at all, and the problem persists. I just want to be able to use the Dash Home, the fact that is crashing every single time I attempt to use it is annoying and is definitely impacting my Ubuntu experience in a negative way. Windows 7 doesn't crash every single time you hit the start button.
Try pressing ALT-F2, and typing in
You could alternatively install lubuntu, xubuntu or maybe Ubuntu GNOME, and see if they're broken, also.