Originally posted by Naughty_Sauce
He has Windows XP. I don't think it's possible to downgrade to DX 6.1.
I think there's a thread that mentions this somewhere ... but in order to downgrade you'd have to completely remove DX from your system. Not highly recommended unless you know what you're doing. Also, many games these days require a higher version of DX, so it'd be hard to to play anything new.