.NET 3.5 SP1 Weirdness on Windows 7

I discovered a quirk today related to  Windows 7 and .NET 3.5 SP1.  I�m classifying it as a �quirk� and not a �feature� since it was fixable <grin>, but since it took me several hours over several days to slog through it, I will hopefully save you the time that you could otherwise spend with your significant other, watching your favorite movie, or indulging in your favorite comfort food.

Goal:  Install the Windows Azure SDK and Tools for Visual Studio 2008

Error:  .NET Framework 3.5 SP1 is required, but not installed

Here�s the weird part:  I�m running Windows 7 Enterprise Edition, fully patched, and everything in Add/Remove Windows Components related to .NET is selected:

I also verified this during the install of the Azure tools in the Web Platform Installer

Just for fun, I decided to try running the .NET Framework 3.5 SP1 installer, but received the following error message:

Harumph.  After hours of searching on the web, including every search engine I could think of, and s a last ditch effort, I decided to swallow my troubleshooting pride send a mail to one of our internal mailing lists.  As a side note, I really hate sending mail to that alias for 2 reasons:  first, too many people abuse that list and send questions without even trying to look for an answer and I didn�t want to look like one of those, and second I was betting the solution was so simple that nobody had blogged about it for reasons obvious to everyone but me.

The answer came within 10 minutes from Wade Wegner:

Since Twitter doesn�t keep tweets in the search results for very long, the tweets didn�t turn up in my searches.  I tried Wade�s suggestion and it worked. 

SO

If you run into this problem (or I do again and don�t remember the pitifully simple solution) it�s here for everyone that wants to learn from my pain.  Turns out this problem will affect ANY installation that has a dependency set on 3.5 SP1.  I�m not sure what the cause of this problem was, but I hope it doesn�t happen again.