Hello. I have a Unibody MBP (2.53 GHz, 4GB RAM, 250GB 7200rpm HDD, Mac OS 10.5.6), which suddenly hangs after booting into my user (the only one). I can maybe open a Finder window, or even Safari, but after that, the OS hangs, mouse pointer can be moved, but no Spaces, Exposé, Dock, nothing can be clicked, keyboard shortcuts don't work. A restart brings up the same problem. It occurred after I manually restarted the machine (after it was acting up again), some System Update completed its install before shutdown. I reset SMC and am now backing up the data, to maybe do a fresh install or something better. Does anyone know and maybe has solved this problem? Thanks in advance.