There is a little white page thing on my icons on desktop

RIGHT click it, you get a menu. If you see "open file location" see if you can tell what it is from the folder. If not open properties and then google the program name. Likely its an application icon for something you (intentionally or not) installed.
 

After doing this a new window has opened with the location where spotify is stored,then delete the desktop icon,after that recreate the desktop icon by rightclicking the .exe plus choose "copy to desktop" and see if the little A4 is still there or that it just has the small arrow like other desktop shortcuts.
Don't know what that little A4 is,but maybe you dragged a file into the icon by accident or something like that?
 


ah, still have it
 


exe file, and custom icon that never had a page on it