Thx, this answers the q for the windows partition, I was not sure that a windows could be converted to a VM using this method.

Is there also a solution to create an image of one of the linux OSs without having to copy the entire disk ?
They consist of 2 or 3 partitions per OS (/,swap and /home)
I looked in the dd man page but did not immediately see an option to include multiple partitions, but as I am not a dd expert, there may well be a way to do this.