I turned on my laptop and saw the recycle bin had something in it. I always clean that so that was odd. I started emptying it but then saw a huge amount of data was inside. I have no idea what it was. I took a screenshot and immediately stopped the process deleting it, but the recycle bin went empty like there was never anything in it. The name of files being deleted was CoreProtocolPNames.class. I ran a virus scan and cleaned my cookies afterwards but nothing came up.
The laptop is running Windows 10, 64-bit. No software should collide with the recycle bin other than CCleaner. Any ideas what this could have been?