Or, continue with the dual boot concept and use the existing Win7 installation http://www.virtualbox.org/wiki/Migrate_Windows http://blog.amhill.net/2010/01/27/linux-ftw-using-virtualbox-with-an-existing-windows-partition/ May need to set up a virtual floppy to get BitLocker to work http://blogs.msdn.com/b/virtual_pc_guy/archive/2008/01/23/using-bitlocker-under-virtual-pc-virtual-server.aspx Or use the USB stick to log in http://4sysops.com/archives/review-windows-7-bitlocker/ http://www.brighthub.com/computing/smb-security/articles/1292.aspx http://www.howtoforge.com/virtualbox-2-how-to-pass-through-usb-devices-to-guests-on-an-ubuntu-8.10-host May need this to get Bitlocker to access the USB drive http://agnipulse.com/2009/07/boot-your-usb-drive-in-virtualbox/ Possibly use PXE network boot to install Windows 7 http://www.bgevolution.com/blog/pxe-network-boot-virtualbox/ http://wiki.debian.org/VirtualBox#SettingupbridgednetworkingforVirtualBox.28VirtualBox.3C2.1.0.29