Windows Tip: Simulate "No to All" in file copy dialog
But what if you want to click "No to All?" There's no button for you, but that doesn't mean Windows won't let you skip all the duplicate files. All you have to do is hold down the Shift key and click No. Now Windows will skip all files with duplicate names and copy the rest of your files to the new directory, thus saving you a lot of time, heartache, and repetitive finger motions.
[via Online Tech Tips and Tech Xpress]