I have a Mercedes workshop manual installed and running on my Win 7 64 bit laptop that uses VMWare Workstation 12 Player. I now want to install a workshop manual for Volkswagens - but it uses VM Virtualbox. Are there problems with installing both on the same machine please....they will never be run simultaneously. I have set the Mercedes manual under a separate user account (primarily to protect the main user) - will there be any advantage insetting another user up for the VW install. Many thanks in advance for advice - I'm PC literate but nowhere near up to speed on virtual machines.