DotNet30 Install Hangs

If you try to install the DotNet30 framework (dotnetfx3setup.exe) and it hangs around 80% with a dialog similar to

"The setup program is loading the components of the setup program. This can take a few minutes"

then you're most likely trying to install from the bootstrap. The work around is to download the full installation file

then run it. the installation should proceed as expected...