LAN Speed Test is a FREE utility designed to accurately measure LAN speeds. It does this by writing a file (you choose the size) to a folder (again you choose), clears windows file cache (otherwise read times would be skewed with results way too high), reads the file back, clears the cache again, deletes the file, and displays the results. LAN Speed Test is a portable windows application that works with windows 98SE, WindowsME, Windows 2000, Windows 2003, Windows XP, Windows Vista, & Windows 7. Just Download and run. No installation needed, no dll's and leaves nothing in your windows registry.