I was running the LXDE desktop with ubuntu 12.04 on a dual boot with win7 on a later model Dell Inspiron. Everything works fine, so I tried the LXDE desktop- luved it, worked great for like a half hour, then it crashed ! Desktop resolution got all wierd, lost task bar, could not get any options to correct anything, nothing worked, froze and had to reboot, at reboot, same behavior. Anyhoooo, I purged the LXDE, would like to try it again, but don't want problems. Any idea why this would happen out of the blue ?

thanks