April CTP Install Error: Corrupt Cabinet File

I just re-downloaded the install and it works for me now. Very strange.

I saw your post and just tried myself but couldn't repro the error - everything installed correctly. If others are seeing this error, let us know.

-Rich

i'm seeing this error - just posted a fresh post, i thought i'd read everything DOH!

anyway, i've tried serveral fresh downloads and none of them work.
same error, me and my teammate are getting... will try some more downloads
Another teammate, instead of choosing the dialup connection on the dropdownlist of the download page, used the cable connection... not sure if that made a difference or if he just had a better cleaner luckier connection...
I noticed that the installation was successfull when using IE to download the msi file instead of Firefox.
I tried to re-download the file from download.microsoft.com by IE for more than 5 times, and still got a "corrup cabinet file". And I try to download it from fileforum.betanews.com, still "corrup cabinet file". I thought that's because there's something wrong with the proxy of the campus and I tried to download it at home, and still got nothing better.

I get the same error (same cab file reference) every time I try - I've tried multiple times, I've used different speeds and I tried once from a different machine.

Interestingly, the one time I tried running the install directly from the download rather than saving first it failed with an error about not having a valid certificate.

I forgot to mention: while I've mostly been trying from IE, I did do the download once from Firefox, with the same result.
Me, too. I installed the newest winFX runtime and win SDK on same environment, it doesn't matter?

Thanks for the feedback. I'm checking to see what might be different between the April and March CTP releases that might explain this behavior for some users but not for others. We'll rerelease if we can figure out the problem and fix it.

-Rich

I appreciate that.

If it helps to define the problem (and what it isn't, which is always handy to know), I've since tried to install it on a VM and my PC at work (including a fresh download), neither of which have WinFX bits or any other betas or CTPs installed, just VS2005. Exactly the same result every time.

I had same problem and spent a day to install April CTP.

And, yesterday, I can finally download the CTP release which is installed correctly.

The problematic install file can be identified easily by looking at the publisher field of "Security Warning" dialog which pops up when I run the MSI on Win 2003 SP1.

The publisher field shown on the Security Warning dailog was "Unknown Publisher".

For the working version, it should be "Microsoft Corporation".

Hope this help.

Solved it!!

first Perfectly uninstall the previous version(06 Jan or 06 March)

ex) remove that and start registry cleanning program (if u feel worry about that please reboot ur computer)

SecondAttempt again!