Hi there. I came across your post while looking for a solution to the same problem with my copy of Autoroute on Vista which stopped working around the same time. I don't know what caused the problem but I eventually fixed mine by following the procedure in this Knowledgebase article. http://support.microsoft.com/kb/870630 The process involves downloading a couple of programs from the Microsoft website and running them after a clean boot. The process is clearly described in the article and covers all flavours of Windows. Hope this works for you too, Cheers, Ron.
