From https://secure.wikimedia.org/wikipedia/en/wiki/Lego_Creator_(video_game)
If you've still got your old Windows 98 CD, you could set up a dual boot which allows you to choose whether to boot into Windows 98 or Vista when you turn the computer on.
Try running it using 95/98 compatiblity mode. If it needs a patch, go to the official Lego download site.
If you've still got your old Windows 98 CD, you could set up a dual boot which allows you to choose whether to boot into Windows 98 or Vista when you turn the computer on.