@lexiebell
Create a folder on your desktop, right click the desktop and select new, select folder. Name the folder something you can remember.
Open the chest, click on the infected files button. Right click on the file you want to test and select extract. In the box that appears navigate to the folder you created on your desk top, click ok. A copy of the file will now be in the folder.
Go to virustotal, use the browse button on there to navigate to the folder on the desktop and the file in it, click ok. The file will be listed in the box, click send. Wait for the results.
If it's clean, go back in the chest, this time when you right click it, select restore. Delete the file from your desktop. and empty the recycle bin.