I'm about to do a fresh reinstall on an old 500mhz Pentium 2 with a 10 gb HD and 128 mb of ram and have my choice of installing either Windows 98se, Windows 2000, or Windows XPpro w/sp2. I dont plan on running any major apps or anything, just the basics (internet, office & light photo editing) so I dont care if I cant run Windows XP's Movie Maker or anything, I just wont use such features. The machine already had XPpro on it so I know it ran okay for just the basics, I was just wondering if an earlier version of Windows might run even more efficiantly on it.