One of my users asked me for a VM last week to test out some demo software. I created the VM and handed it off. Later, he told me that something was wrong with the server because he couldn’t get his demo to run. It turns out that the demo was provided as a zipped-up collection of virtual machine files. The software vendor had instructed him to install VMWare Player, load up the files, and run it that way. Of course, the VM I provided him wasn’t set up to run a nested player, so I told him to give me the files and I would load them up as a native (and un-nested) virtual machine.