First, you're barking up the wrong tree. We're not Adobe.
Second, did you read the very first post (or any of the others) that have a potential fix? Did you try any of them?
Heres what I did. Had same problem of updater erroring out at 75% installation.
1) Install Microsoft clean up utility(more info: - <http://support.microsoft.com/kb/290301)>
2) Run clean up utility and remove adobe previous versions, which would remove registry entries as well.
3) Install adobe reader 9.
Hope this helps.