For some reason, all of a sudden, all virtual machines are gone from the User Interface in virtual box. I suspect CCleaner has something to do with it, but that's not the point. Both the virtual hardisks and the .xml files for the machines are still in their respective folders. How can I use them to get my virtual machines back into virtualbox?

I tried simply creating a new machine from the old virtual hardisks, and it worked with the ubuntu guest, but not with the windows one. Plus, it'd be nice to get my old machines back instead of having to create new ones, that would keep me from having to fix some shortcuts as well as reconfigure shared folders and other stuff.

Thanks

EDIT:Running Windows. [Solved]