I recently added Service Pack 3 to my son's machine with WinXP Pro on it. It has a Hauppauge WinTV card in it, that stopped working. I have the driver, but the driver install program won't finish, ...
go for it. WinxP's system restore will let you roll-back if it doesn't work. <P>If perchance it goes really badly and you blue screen on reboot, winxp will let you boot with last known good ...