There are 2 pints in 1 quart, so there will be 3 pints in 1 and 1/2 quarts.
Hi Niki, I understand that Windows Reader is the default Viewer for PDF files. What I was asking was how this was stored in the registry. The key HKEY_CLASSES_ROOT\.pdf key has (Default) = AcroExch.Document (if you have Acrobat Reader installed). In Windows 8 the .pdf key has (Default) =  (blank).
Windows 10: The Recycle Bin is stored in File History. I have configured File History, but when checking to see whether everything was working, I was surprised to see that the Restore personal files window showed that File History had saved recycle bin folders for each the drives that I am backing up, and I cannot see any way to exclude them.