I have a laptop with Windows Vista in it. To connect to my work’s VPN I need Windows XP installed. the problem is that when I boot my laptop with Windows XP CD, it doesn’t recognise the Hard Drive, and I don’t have Vista CD as it came by default with my laptop. Is there a way by which I can install the VPN client that has been programmed to work on XP and not on Vista? Otherwise how can I run Windows XP on my laptop without Vista CD?