Hi, welcome to justanswer.com! My name is Mike.I am going over your question and I will be with you shortly.
I will need some information before we begin:Please go to the Apple logo at the upper left of your computer screen to About This Mac and give me this information:
Ok I can help you by remote. Otherwise to do it yourself just go to your Home folder and open the Desktop folder sort by list and date then you can grab all of them at once and move to a folder or right click on all of them and go to Put Back if available.
If you are satisfied, please kindly provide an OK or Above Rating - so I get paid. Keep in mind you can always come back to this page at any time regarding this question. Thanks!!