If you accidentally delete the default library folders on Win7, you can follow the following steps to restore them: 1. Click the start menu and select "Computer". 2. Click Document, Music, Picture or Video on the left panel. 3. In the new window, click the Library tab and select Restore Defaults. 4. You can repeat this step to restore all the lost default libraries. If you still can't find the default library folder, you can create a new library folder. Just right-click a blank space on the pane in Explorer and select New, Library. In the pop-up dialog box, key the name of the repository and specify the location of the repository. You can add libraries to the Libraries tab for easy access.