Just wanted to chime in and say I have the exact same problem with the UK version. Gonna try installing from Hard drive and see how I get on.
edit: sigh, installing from HDD didnt work. This is pretty damn frustrating. ANy other ideas?
Windows 7, RC1, 64bit btw
edit2: finally got it installed. The file name was case sensitive so renamed the file on my harddrive to the case it was looking for and it worked!