Thank you very much for that response. Yes, I do rely on connecting my DOS VM (actually DOS 8, the non-Windows part of Windows 98SE) to a separate FAT32 formatted virtual disk which is shared with a Windows 7 VM; it's my long-winded way of getting files in and out of the DOS world!

If this will no longer work with Workstation Pro 17, I'd better stop upgrading right here!

Brian

EDIT: Just re-reading your response, and my message above, maybe I've misunderstood something. I don't every try to mount my VM MS-DOS "C:" drive in another VM, but what I do do, is have a separate FAT32 drive, which appears as "D:" in my MS-DOS VM, and as "E:" in my various Windows VMs. I can't run any two versions of Windows at once, nor Windows and MS-DOS simultaneously, because of the potential for double-updates and other sharing conflicts on this additional virtual drive, but what I can do is copy files to and from it in either DOS or Windows, then shut down, and run the other OS, to retrieve the files. It might be a bit long-winded, but I only typically have to do this once per week or so. So supplementary question: do you know whether this method of exchanging files between MS-DOS and the outside world, might still work?