Test your Internet connection: Windows Internet Connectivity Evaluation Tool

Microsoft has developed a free, ActiveX based testing tool for Internet connections and routers: Internet Connectivity Evaluation Tool. The tool "checks your Internet router to see if it supports certain technologies. You can use this tool on a PC running either the Windows Vista or Windows XP operating system." If you want to make sure your connection and/or router is compatible with Windows Vista, you might want to give this tool a try.