Problem updating from C6 to 6.0.7

I just bought a new PC Hp envy Phoenix 16gb, 1tb hard drive, windows 8. I had to re-install cubase 6 on this new computer and I’m trying to download the patch update for cubase 6.0.7 but every time I go to open the exe. file I get this message (The central directory was not found in the archive, or you were trying to open not the last disk of a multi-disk archive) any help? :blush: