My name is Munawar and i work for Social Media and Community for Dell
In response to your post, please try Installing the Ccleaner software which should help in cleaning the disc and also deleting the unwanted files from the comp and restart the computer once to see the difference.
Please click on the link below to Download and Run Ccleaner:
Please reply us back on this post if any concerns.
Thanks & Regards
Dell Social Media Responder