The problem persists in the last release of measurement stidio also. This problem also occurs on the last Windows 7 RC1 version as well as Vista. I would like a suggestion about how to read the opc DEMO URL's without using Measurement studio since we sonn will not use Windows XP at all. Right now I have to copy and paste the URL's but that is not so easy when we have 20 + installatyions around the worls and any slight change in the Hardwrae installation affects the URL.