Windows 7 stops booting in Virtualbox
I installed Windows 7 in Virtualbox and it worked fine until I installed all the updates… After that the boot process stopped at the splash screen and nothing happened. Neither restart nor boot in safe mode helped.
Close Virtualbox completely. Restart it and go to the Settings of Windows 7. Here change some parameters, e.g. the number of processors and the amount of memory reserved for the system. After this Windows 7 booted up normally. I could even restore the settings without corrupting the booting process.