OK got it to work, had to copy the .scr to the “c:\windows” directory, I think it has to be in the c:\windows\system32 directory also. Anyhow there is no c:\windows\system64 directory there is a c:\windows\sysWOW64 directory, but copying the .scr to that directory has no effect. (Wow, let me summarize – the .scr file has to be in the c:\windows directory and the c:\windows\system32 directory for it to work on my 64 bit Vista home premium system. Thanks for the help you steered me in the right direction. BTW I really like this program, Are you working on adding some more effects ? Let me know when you have some. Regards.