I'm locking the other post.
I just purchased a new Dell Studio desktop with Win 7 for my office without the IT person's advice, which annoyed him and he is now insisting that I can't run Win 7--that all computers on the network must be on the same operating system (most are using XP), and he claims all computers must have same software, and has moved people "back" to Excel 2004, etc, removing newer editions.
I can't find any evidence to support this. He claims that the server won't run properly if we use different operating systems. I think he is misguiding us. He also insists that Mozilla products are for "home users" only and won't "let us" use Firefox, which is ridiculous. I would like support for using Win 7. Any input?