Microsoft to start automatic IE upgrades without user prompt
I'm not sure if this fit's into the "Installation" section, but I just read an announcement from MS which might be interesting for Siebel Admins.
Microsoft is planning to start automatic internet explorer updates to upgrade IE to the latest version (e.g. IE9) without any user interaction. Might be a problem for enterprises not using WSUS. Make sure to install the "Automatic Update Blocker toolkit" mentioned in the article, to prevent your machines from upgrading themselves.
read the article on Windows Team Blog here
With automatic updates enabled through Windows Update, customers can receive IE9 and future versions of Internet Explorer seamlessly without any "update fatiquie" issues.