My apologies for not fully reading your initial post; I see now that you did indeed go there and done that.

I see that Microsoft offers their wisdom, with clear instructions for Win2000 & ME!

You may want to try Revo uninstaller to remove existing Adobe. (It's free, and a good tool to have, anyway) . If that and a registry cleaning don't do the trick, perhaps the nerdier among us can help (they're usually here, lurking). Good luck.