I am running Vista RC1 (on Turion 64) and was encountering the installation failure at the end of the install process. I forget the number it gives, but it was listed at the top of this thread.
I am reporting that the action that enabled me to install LLBLGen is the one suggested by Otis:
- To remove the User Account Control you need to go to Control Panel - > User accounts. There you will find an option to turn on or off the UAC (User account control).
After that it installed smoothly.
Scott