I am getting a similar problem. I am not sure if it is because i am testing in a VM, but when I test the wallpaper script it appears that the string is being typed to0 quickly. on some occasions mspaint is typed incorrectly, leaving some of the letters out, on other occasions the userprofile string is not getting some of the characters entered. obviously this means the commands are not getting executed as unrecognized text is being entered. can this be solved by changing the delays or is it simply the VM is not responding quick enough to keep up with the ducky? Any ideas? I don't want to try testing more complicated scripts until i can work the little bugs out first.