I tell my problem to see if together we find the solution. Team: macbook pro 17 os x lion 10.7.2 factory. A few days ago I was updating the mac and supendio in the middle of the process. when I wanted to turn it the rest would not start .. (he wanted to set, sound disc and DVD reader) and thus put out 3 times after that I start. chequie updates and note that they were not. Lei in apple support if this had happened to chequiar with them and reinstall if the mac recognize him. I did it again and installed MySQL. to reniciar Mac after optimized. it lit up and apagana as explained before. But I start to end. Note that the system was slower and easily reheated when using Adobe CS4 programs. In addition to a blue screen (for a second) to turn on the mac but before starting Chequie OS Updates and detail were here twice, three. same version and same size upgrade. Lei in applesfera and apple support that the only way to get updates was reinstalling the OS. As I did so from the recovery mode: 1- clear and formatie the disk Macintosh HD 2- os x lion insale. everything from the Recobeery HD. Marabillas TO ALL OF HERE. the OS worked well, there was coming down slowly or overheating. until you install the Adobe cs4 and updating java requesting to run. After install the CS4 restart and here again the problem. BLUE SCREEN ON AND AFTER BEFORE STARTING OS. THE QUESTION IS: porq goes blue screen. if supposedly would the OSX intalado zero with formatiado disk. Since initially when buying mac adobe programs worked properly (with update java). WOULD BE POSSIBLE SOLUTION DISK FORMATIAR OSX LION AND INSTALL FROM AN EXTERNAL DRIVE? Many Thanks!