In the location bar enter C:\$Recycle.Bin and press Enter
Click Organize
Select Folder and Search Options
Select the View tab
Select Show hidden files, folders, and drives
Untick Hide protected operating system files
Click OK
You can also do this from the command line but the file names are encoded as explained in the linked article. When I tried this I noticed I could see more files than were visible in Explorer.
Click Start
Type cmd in the seach box and press Enter
Type cd c:\$recycle.bin and press Enter
Type dir /ah and press Enter to see all the available folders.
Type dir *.* /s and press Enter to see all the files in all the available folders (with their encoded names).