An Error Has Occurred:
Silverlight Tools cannot be installed because one or more of the following conditions is true:

1. Visual Studio 2008 RTM is not installed.
2. The Web Authoring feature of Visual Studio is not installed.
3. A previous version of the Silverlight Runtime is installed.
4. A previous version of the Silverlight SDK is installed.
5. The Visual Studio Update KB949325 is installed.
6. A previous version of Silverlight Tools is installed.

To continue, please install or uninstall the appropriate products and run this installer again.

Extract the file with 7zip
when extracting the files you can use each installer to instal the files seperately, but when I tried to use the toolbox it wouldn't work...

Solution
After some research it turns out that the Silverlight 2 Tools Beta 1 for Visual Studio 2008 installs the Silverlight 2 Beta 1 runtime and SDK as part of the package. This causes a problem if you already installed the plugin or the SDK.

Apparently the Registry Entry “HKLM\SOFTWARE\Microsoft\VisualStudio\9.0\ToolboxPages\Silverlight Components” must not exist or the installer fails. After simply removing this entry, the install worked without a hitch. This must not get removed correctly by some versions of the Silverlight Tools.

This is Hello Secure World!
Come in. Look around. Once you've cleared security you'll find:

• insider interviews
• informative videos
• interesting blogs
• a challenging game
• and an original comic strip

Take a break from work and watch a How Do I? video, take part in an exclusive virtual lab, read the latest entries from a variety of security-related blogs, or challenge your friends to a stimulating round of Attack Defender.

If you're interested in Internet security, there's something here for you.

Enter Hello Secure World

Download now

Internet Explorer 8 Beta 1 (Developer Preview)

Welcome to the website for Internet Explorer 8 Beta 1. Internet Explorer 8 Beta 1 is a developer preview for web designers and developers to help prepare their websites for the launch of Internet Explorer 8. Some of the new features designed for developers include a developer toolbar and improved interoperability and compatibility.

Internet Explorer 8 is designed to work in standard mode out of this box. However, Microsoft provides a way for users to browse the web in a way similar to Internet Explorer 7 by using the emulate Internet Explorer 7 button on the chrome. Learn more.

The web at your service

Internet Explorer 8 will take the web experience beyond the page. Internet Explorer 8 introduces a new way to seamlessly experience the best of the web whether you are a web developer writing to standards or a user discovering a new online service. Be one of the first developers to take advantage of improvements in Internet Explorer 8 for your websites and applications. Learn more.

support
BLOG
IE8 home page

Zoomit is the.must.have.tool when you want to have to demonstrate some code examples to a larger group.

With this tool installer you can press the CTRL+& keys and allow your screen to become a zoomwindow.

You can read more here