Error while installing .NET framework 3.5

The .NET Framework 3.5 installation fails for me. Right after the "Downloading components" stage, it sits for a few seconds on:

Setup has f开发者_高级运维inished downloading components, you can now disconnect from the Internet

Then it starts to roll back. I'm using Windows XP SP2. A glance in the log files shows that it seems related to MSI error code 1603.

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Make sure you have the latest Windows Installer - here is a link to the 4.5 download.

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You should rename c:\windows\system32\spupdsvc.exe to something else and retry the .NET Framework 3.5 installation. If you using a batch file you can use:
"REN c:\windows\system32\spupdsvc.exe spupdsvc2.exe"

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You should be able to find a more detailed error in one of the locations mentioned in blog post Where to find .NET Framework 2.0 SP1, 2.0 SP2, 3.0 SP1, 3.0 SP2, 3.5 and 3.5 SP1 setup log files.