The .NET Framework 3.5 installation fails for me. Right after the "Downloading components" stage, it sits for a few seconds on "Setup has finished downloading components, you can now disconnect from the Internet" and then it starts to roll back. I'm using XP SP2. A glance in the log files shows that it seems related to MSI error code 1603. Things I have tried: - reinstalling SP2 - uninstalling and reinstalling every .NET Framework version before 3.5 with all service packs Per Aaron Stebner's WebLog, I tried to enable verbose MSI logging, but even so the logs didn't really enlighten me. Here are all the files from my temp folder generated during setup: [URL]http://thecybershadow.net/dump/c5719a60148f4ae60a5fa4e3887b3baf/logs.zip[/URL] Hopefully someone with some time and experience in the field can give me a few hints or things to try. Thanks!