I couldn't get XNA Game Studio to install. It took me a little while to figure out the problem. The install logs showed this:
Action start 4:55:44: PublishProduct.
MSI (s) (10:50) [04:55:44:421]: Resolving source.
MSI (s) (10:50) [04:55:44:437]: Resolving source to launched-from source.
MSI (s) (10:50) [04:55:44:468]: Setting launched-from source as last-used.
MSI (s) (10:50) [04:55:44:484]: PROPERTY CHANGE: Adding SourceDir property. Its value is 'C:\Program Files\Microsoft XNA\XNA Game Studio\v3.0\Redist\XNA FX Redist\'.
MSI (s) (10:50) [04:55:44:515]: PROPERTY CHANGE: Adding SOURCEDIR property. Its value is 'C:\Program Files\Microsoft XNA\XNA Game Studio\v3.0\Redist\XNA FX Redist\'.
MSI (s) (10:50) [04:55:44:546]: PROPERTY CHANGE: Adding SourcedirProduct property. Its value is '{3898934B-05AE-41CD-96BE-70DA9BFBCE1F}'.
MSI (s) (10:50) [04:55:44:562]: SOURCEDIR ==> C:\Program Files\Microsoft XNA\XNA Game Studio\v3.0\Redist\XNA FX Redist\
MSI (s) (10:50) [04:55:44:593]: SOURCEDIR product ==> {3898934B-05AE-41CD-96BE-70DA9BFBCE1F}
MSI (s) (10:50) [04:55:44:609]: Determining source type
MSI (s) (10:50) [04:55:44:640]: Note: 1: 2203 2: C:\Program Files\Microsoft XNA\XNA Game Studio\v3.0\Redist\XNA FX Redist\XNA_Framework30.msi 3: -2147287038
MSI (s) (10:50) [04:55:44:671]: Note: 1: 1316 2: C:\Program Files\Microsoft XNA\XNA Game Studio\v3.0\Redist\XNA FX Redist\XNA_Framework30.msi
MSI (s) (10:50) [04:55:44:687]: Product: Microsoft XNA Framework Redistributable 3.0 -- Error 1316. A network error occurred while attempting to read from the file: C:\Program Files\Microsoft XNA\XNA Game Studio\v3.0\Redist\XNA FX Redist\XNA_Framework30.msi
Action ended 4:55:44: PublishProduct. Return value 3.
MSI (s) (10:50) [04:55:44:750]: Machine policy value 'DisableRollback' is 0
MSI (s) (10:50) [04:55:44:765]: Note: 1: 1402 2: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Installer\Rollback\Scripts 3: 2
MSI (s) (10:50) [04:55:44:796]: Note: 1: 1402 2: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Installer\Rollback\Scripts 3: 2
MSI (s) (10:50) [04:55:44:828]: No System Restore sequence number for this installation.
MSI (s) (10:50) [04:55:44:859]: Unlocking Server
Action ended 4:55:44: INSTALL. Return value 3.
The solution ws to uninstall XNA Framwork 3 and reinstall it. Just posting this for anyone else who runs into the problem.
Creaper