When you use My Computer or Windows Explorer to expand a drive or a folder, a Search Window opens, or a CMD.EXE window opens, or some other inappropriate action is performed.
These behaviors can be the result of an altered default action for the respective File Types.
The default action for a drive, and a directory, should be none, while the default action for a folder should be undefined (nul).
NOTE: A directory is a File Folder File Type.
You can use AlterDefaultAction.bat to fix this behavior:
1. Close all instances of Windows Explorer and My Computer that are open on your desktop.
2. Open a CMD.EXE window.
3. Type the following, pressing Enter after each line:
AlterDefaultAction folder nul
AlterDefaultAction directory none
AlterDefaultAction drive none