If you have the CD or floppies for an old operating system, try VirtualBox
(freeware). It's easier to setup than the Microsoft one and has more features.
I use it on my XP computer to run Windows 7 and Ubuntu as virtual machines, and have also used it for 98 and Vista within XP. It supports operating system going back to 95 and DOS, so you should be able to get your games working, however old they are.