I tried with Windows 7 and Ubuntu and computer blocks while boot. The only way I can get to my hdd is by running a live Ubuntu usb (with nolaptic feature activated). I run a memtest and everything ok. So what could be broken? RAM, hdd (I copied all my files with no problem while on live usb)?
I tried all classic windows features, repair, safe mode. It blocks during loading when Microsoft and the loading yellow lines appear at the bottom. With Ubuntu it blocks with the mauve screen. It did started out of the blue, no upgrades or software installs. But I had some problems with internet connection previously. The machine is a mini sony vaio.