I do have 7-zip installed here. I could also be mixing memories across a few Windows versions. I know I've caused files to be extracted without a dialog in the

I do have 7-zip installed here. I could also be mixing memories across a few Windows versions. I know I've caused files to be extracted without a dialog in the past, which irritated me a great deal, on a vanilla system. But it's entirely possible that's a vista-era memory at this point.