1. If there are hidden files like autorun.inf in each partition, it's best to restart your computer after deletion.
2. Reset the opening method in file types (taking XP as an example): Open My Computer -- Tools -- Folder Options -- File Types, find "Drive" or "Folder" (the specific one depends on the issue you encounter; if you can't open a drive by double-clicking, choose "Drive"; if you can't open a folder, choose "Folder"). Click "Advanced" below, then click "New" in the "Edit File Type" dialog box, and fill in "open" in the operation field.