"Except as otherwise permitted by the NetMeeting, Remote Assistance, and Remote Desktop features described below, you may not use the Product [XP] to permit any Device to use, access, display or run other executable software residing on the Workstation Computer, nor may you permit any Device to use, access, display, or run the Product or Product's user interface, unless the Device has a separate license for the Product."
According to this, things like VNC or RAdmin are illegal on XP. Can they forbid you to run software on XP that's otherwise perfectly legal? src: [http://www.infoworld.com/articles/op/xml/02/05/27/020527opwinman.xml]