Software requirements are low. It should suffy you have Windows 95 or higher. All higher versions of Windows should be compatible.
Remark that Win95, Win98 and WinMe can load up to 32kb files in a panel while NT, 2000, XP can load much more (MBs).
Hardware requirements are nihil; the slowest Pentium will be more than enough and the needed hard disk free space is about 1MB only... .