VMplayer usually does not create files named like this - are you talking about a partition or a file ?
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VMX-parameters- WS FAQ -[ MOAcd|http://sanbarrow.com/moa241.html] - VMDK-Handbook
You also find me in the support crew of PHD Virtual Backup
This is a 'volume'; it is listed in the Windows7-Control Panel-Computer Management-Disk Management panel as an "unallocated" sector. It's 8MB in size. Before I un-installed VM Player, I removed the only virtual machine I'd made. I never installed anything on that virtual machine.
That sounds unrelated to any software on the host. When you partition the disk, there can be a tiny bit of space at the end that's unusable, because the file system requires that the size be a multiple of some number (usually a power of 2). It may also have been set up by the OEM to hold emergency repair data.