Yeah, I just tried.

I started off with NT 3.1 and worked my way up: NT 3.5, NT 3.51, NT 4, 2000. So far, so good, no major problems.

Then came XP. I inserted the disk and told it to install.

It restarted, and then I saw a setup screen, but no mouse (?). After a while it decided to restart again.

THen came the surprise - the screen stayed pitch black! Nothing! It did do something, as the CD-ROM drive and the hard drive could be seen working, but the screen didn't show anything. After an hour it stopped, so I hard reset the thing.

The boot-up must be the worst I have ever seen. Even my 8 MB Windows 2000 performed better than that. Also, it doesn't even finish correctly, it bugs out at the last second. Safe Mode is broken altogether.

It's a surprise that it's so much trouble to upgrade to XP, when you'd think that would be one of the most important things. Someone else tried the very same thing, and he got a bluescreen as XP tried to upgrade the system. Odd.