I saw an XP Myths page this weekend, and although I don't agree with its assessment of XP's security, most of it seemed credible. It said XP can do fine on as little as a 233 MHz Pentium with 128 MB of RAM.

I whipped out a P2-266 with 192 MB of RAM to see.

The specs are humble, to say the least: P2-266, 192 MB RAM (upgraded from 96 because XP kicks into some kind of "reduced functionality" mode with less than 128), and a very old Seagate 1.2 GB hard drive.

I installed XP with lots of pieces, like Media Player and the Internet Connection Wizard, removed, although I did leave in Internet Explorer.

Initially I formatted the drive FAT, since FAT does perform about 20% better than NTFS on limited hardware. The problem was the cluster size got me. Formatted FAT, I had about 100 MB free when the installation was complete, which is dangerously low. Converting to NTFS brought that up to 170 MB, and gives the option to compress some items to get some more space.

Performance wise, it's not as bad as it sounds. Windows boots in 1 minute, 15 seconds after defragmenting the drive. Considering this 1.2 GB drive probably dates to 1996 at the latest, that's awfully good. Memory usage was 96 MB, so you'd be able to run an application or two on it, although a modern web browser would feel claustrophobic after a while.

If I were actually going to try to use this computer, I'd put a decent hard drive in it--the newer the better, of course.

I would also want to upgrade the memory to 384 MB, which is the maximum this one supports. A cut-down XP seems to do just fine in 192 MB of RAM, but it wouldn't do so fine with antivirus software loaded.

I still think a cut-down Windows 2000 is a better choice for this type of machine, but it's certainly possible to run XP on it. With either OS, though, I would use Nlite to remove as much of the fluff as possible, to give yourself some space for whatever it is you really want to do with the machine. I think it would make a good PC to run educational software for kids, for example. And it's nice to have a choice of something other than Windows 98 for that.