Having a virtual machine on-hand can be useful for a variety of purposes, such as testing software or tweaks in a sandboxed environment that is separate from your primary operating system. A virtual machine can also help you to run older software that doesn't work with your new operating system, or simply exploring a new operating system altogether.
A quick patch update to Windows can extend the useful life of a PC. To take the fear out of Upgrading Windows 98 to Windows XP, rely on this guide. - PCSTATS Tips