If you are redirecting the Desktop folder for users on Windows Vista laptops, a knowledgebase article just been published that might be useful to you. Here’s details of what this article addresses:

SYMPTOMS
Consider the following scenario:

  • On a Windows Vista-based computer, you redirect the Desktop folder to a network redirection folder.
  • You enable the Always Available offline option to make the Desktop folder available offline.
  • The computer is connected to a network that does not contain the redirection folder.
  • You restart the computer, and then you enter your user credentials on the Welcome screen to log on to the computer.

In this scenario, you see a black screen for 30 to 120 seconds before the desktop or the Start menu appears.

Details here: After you log on to a Windows Vista-based computer that has the Desktop folder redirected, you see a black screen for 30 to 120 seconds before the desktop or the Start menu appears