strange going's on with SP1 update

I recently updated to sp1 on Vista Ultimate x64. And tested some games but this one has me puzzled?

Installed the game Beyond Good and Evil & it installed ok but after the third disc the installation just disappears and the Ubisoft folder that should be in program files (x86) is not there.

Even tried creating a new folder but it just appears empty.

Done a search but turned up no results.

The strange thing is that the space goes down on the drive I’ve installed it to.
So where is it going? Any Suggestions.
Thanks.

check your temp folder. the one under users

Checked the temp folder under Users nothing in there that resembles anything of the game.