I got it running on a P1 166 Mhz, 32MB RAM, 2 GB HDD machine last week. I don't recommend trying it - it goes continuously into virtual memory and slows to a crawl. But I wasn't going to spend $100 for some obsolete EDO SDRAM to upgrade it. Office wouldn't run right, so we're going to switch back to NT4, and hopefully replace the computer with a better one when the budget allows...