I have a Toshiba Satellite laptop with 4GB of RAM running Windows 7 Ultimate 64-bit SP1 After this one update from Microsoft, my computer will only boot in safe modes (every kind of safe mode) and after a reboot it will boot back into regular windows fine, install a update and fail to boot again. It hangs at a blank screen with the mouse after the bootanimation is done. Which update is it? I don't know yet because I just figured out now that it's not booting because of an update. Read updates in thread.