When I run the System Optimizer on my Windows Server 2003 computer I get a error that says "The System Optimizer is only available for users of Windows XP, Windows Vista and Windows 7!" There's no reason that it shouldn't work since Windows Server 2003 is basically the same operating system as Windows XP. The program CachemanXP works on it so why doesn't jv16 PowerTools 2010 work? I am VERY disappointed with this error!!! I feel that a updated version of jv16 PowerTools 2010's System Optimizer should be available that works on Windows Server 2003. This is unacceptable in my opinion. I've been waiting a long time for a stable version of jv16 PowerTools 2010 to run on my server and now this error occurs. I always tweak the registry on my servers.