My name is Jane Maliouta and I’m the program manager for IE8 Deployment and Management.
When you install Internet Explorer 8 Beta 1 there are a few important things to do before you start. First, I recommend you review the system requirements to make sure IE8 is supported on your computer. Second, take a look at the IE8 Release notes to find known issues and workarounds, so you’ll know what to expect during installation. Third, if the installation fails, we have a knowledge base article on Troubleshooting IE8 installation that guides you through a few workarounds.
Here is some additional information that you might find useful when installing IE8.