I did a video and needed to send it to someone, so it was too large to email, so I sent it to my Dropbox account. Now, I have DropBox on my desktop and all my desktop items have a checkmark next to them. How do I get these off and take off Dropbox from my Desktop without messing up my dropbox?
It sounds like you enabled the computer backup feature for your desktop app.
To disable this, please follow the steps outlined at the bottom of this page. Once the backup is disabled, you can move the files from the "My PC/Mac" backup folder in Dropbox back to their original locations.