Hi, I did some more testing and went crazy. As far as I can see,you have used the original swflash.cab content. with XP it works all the time, with W2k it seems to fail also registering immediate browser integration. (swflash.cab does it either but msi installer does it) One solution works also within Iexpress: using: "rundll32.exe advpack.dll,LaunchINFSection swflash.inf, DefaultInstall" always works fine. I will stop investigating because its a minor problem to me.