When you use the Copy this file or Move this file options from the Common Tasks pane, the Copy items / Move items dialog may open partially off the screen.
To resolve the problem, move the dialog box to the center of the screen and resize the Window to your preferred size. Then close the dialog by clicking the [X] button at the top.
If the settings are not retained, manually reset the window placement values in the registry. Follow these steps:
HKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ CurrentVersion \ Explorer
- Browse For Folder Width
- Browse For Folder Height