Quit Skype. If you can see the Skype icon in the taskbar (at the bottom right of your screen), right-click it and select Quit. If you cannot see the Skype icon, use Task Manager to close Skype. Simply press Ctrl+Alt+Delete and click Start Task Manager. In the Applications tab, select Skype, then click End Task.
In Windows Explorer, go to Tools > Folder Options.
Click the View tab.
In Advanced Settings, under Hidden files and folders, tick Show hidden files and folders, then click OK.