
You can run Windows 10 and 7 side-by-side or a Linux install on top of Windows and so on. VMware Workstation is one of the best virtual managers and will enable you to install and user more than one operating system. There’s no reason why you couldn’t run and test Windows 10 on your 7 machine or vice-versa, using an old copy of Windows Vista on your Windows 10 machine, to test software before you install on your primary operating system. These days running a virtual version an operating system is practical. Using Windows on a PowerPC Mac was just not feasible apart from testing software. On a single-core machine, this resulted in severe slow-down.


A few years ago running virtualisation tools was a bit of a disaster, particularly when the virtual operating system had to emulate the CPU, graphics card and shared memory with your system.
