I'm running Vista SP2, x64. Because I wanted to test out the IE9 beta, I downloaded the English-language installer for 64-bit Vista systems. Running the installer is fine until it starts downloading required updates. The progress bar doesn't get far before it completely stops moving. Then after 20 minutes to an hour, it will tell me that there's an update I have to install, but as soon as I click OK it sends me an error message, telling me that it can't go to the url of the update which is here. So I manually enter it into my browser, which prompts me to download a standalone update. After that's been downloaded and I run it, it tells me that the update does not apply to my system.

I'd appreciate any help to solving my problem.