I have a new laptop with Windows 7 as the host OS. I had installed VirtualBox onto the machine and after installing 4 guest OS's (Linux Ubuntu, OpenSolaris, FreeBSD, and XP pro) everything worked absolutely fine until I had to reboot or restart my host OS which it then gave me the BSoD as it attempted to restart.
This occurred over and over until I booted into safe mode and restored my system to pre-VirtualBox which fixed the problem. I had a feeling it might be the guest OS's causing the issue so I unmounted all of them and reinstalled the VitrualBox program again fresh (after deleting the .vdi files etc.) and the problem persisted.
I attempted to switch virtualization software to VMWare and before decided to load a guest OS to that, I attempted to reboot and restart and I got the BSoD again at start up.
PLEASE HELP! The memory allocated for each guest OS was that which was recommended but it seemed to be taxing my memory a bit. Any suggestions?