6 gig hard drive (windows 2K) and pentium 400. A little slow, but it has worked for a long time. It also runs a archaic immunization program I sometimes need to reference.
With Win XP, I have a couple of machines that have 20G hard drives. You don't need a lot of hard drive memory.
Celeron 1.8 should be OK. WHAT IS MORE IMPORTANT IS RAM. If you can get at least 1 Gig of RAM it will run faster on the the celeron than a Pentium 2.4 with 256 or 512 K of RAM.
