Today finally time to install Windows 7 on a virtual machine. Only it ended fairly quickly with a "failed to start" message. Without any clue as to what might be wrong. Searching on the internet did not reveal the answer directly, but someone had made a description of his own installation, mentioning the amount of memory allocated. That rang a bell. VirtualBox's default is 192 MB. That's not enough. I raised it to 1024 MB and now Windows is installing happily.
