I have different issue in that I had dl'd the patch and played it. But I had also installed numerous betas and tweak files since I had first installed fb that I wanted to go ahead and clean out the old and do a fresh clean install.
Well after uninstalling Fb and cleaning all ubi IL FB files off my HDD I ran a defrag and grab my dsik to installl it new.
CD1 auto runs, asks language the begins to install. It installs the temp files and does it checks and then finally goes to "Prepare to install". The "blue bar" gets about 1/5th the way and the error pops up.
I searched my reg for any remaining files, I did file folder search for any missed files as well.
In the windows temp file a setup text is created. within this text I found this
ProductCode={8DF712DA-D325-4FD0-8DE8-E2D78FC3CDC3}
That 8df7 folder is the one with the problem. I am thinking it may be a problem with the security protection.
I was looking to see if there was something I could spot that is obvious in error but no luck.
So go ahead install the patch. It ran fine for me and my problems are unrelated to it.