Stuck at “Preparing to configure Windows”

How do I reset Windows Update components?

http://support.microsoft.com/default.aspx/kb/971058

 

Once the Windows Update components are reset, try installing the updates again. To do so,

1. Open Windows Update by clicking the Start button, clicking All Programs, and then clicking Windows Update.

2. Click on the Change settings option in the navigation bar on the left. You will now be at a screen where you will be able to set up how Windows Vista will download and install updates on your computer.

3. Select the option Check for updates but let me choose whether to download and install them. When you are done configuring the options as you wish, press the OK button to save these settings. You will now be back at the main Windows Update screen.

4. In the left pane, click Check for updates, and then wait while Windows looks for the latest updates for your computer.

5. You may then download the updates one or two at a time.

6. Click on install updates to install the currently selected updates.

7. Repeat the steps 5 and 6 till you get all the updates you want on your PC.