First uninstall Spotify and then delete these folders if they exist:
C:\Users\YOURUSERNAME\AppData\Roaming\Spotify and
C:\Users\YOURUSERNAME\AppData\Local\Spotify
After that reinstall Spotify
If you can't find the folder, try this:
Uninstall Spotify: Start > Control Panel > Programs / Uninstall a Program > Spotify Find your AppData folder and delete all Spotify data. Start, run, type: %appdata% and hit enter You probably see 4 folders; enter each and see if they contain a folder called Spotify. Delete the entire Spotify folder. Restart your computer at this point. Reinstall Spotify (download)