Operating Systems

When I have to ask what OS the customer is using there are no surprises.
It is always Windows XP or Vista.

But there are strange answers when I ask "What Operating System does your PC have?"

-Windows Desktop.
-Explorer?
-Tha who?? (Lateesha from Louisiana)
-Windows Millenium
-COMPAQ PRESARIO
-It's a DELL.
-Um... Comcast.