Tips & Tricks
If you’ve got old but important software that no longer runs under Windows 7, then you could try using XP Mode, a virtual copy of XP that runs in a window on your Windows 7 desktop. This only works with Windows 7 Professional, Enterprise, or Ultimate. And your system will need to have hardware virtualisation (AMD-V or Intel VT) built in and turned on, too (check your Bios to make sure).
An alternative is to use VirtualBox, a free virtualisation tool that doesn’t insist on hardware support, but you will need to find a licensed copy of XP (or whatever other Windows version your software requires) for its virtual machine.