My Windows installation on VirtualBox is stuck on the initial setup screen. I checked that virtualization is enabled and the ISO image works fine in Hyper-V VMs on the same machine. I googled some logs and also checked YouTube, but nothing seems to work.
Windows 7 64-bit - 2GB of RAM - 15 GB of disk space
After around 20 minutes the VM window has only a mouse pointer with a black background.