Go to the start screen
Choose All Apps at bottom
Under Apps choose Reader (NOT Adobe Reader, just "Reader")
What do you see?
By the way, since Windows 10 doesn't exist yet, I'm assuming it's Windows 8.
When I right click on the start icon I only see Properties and Windows
I have windows 7; Internet explorer 10
Ah, ok, the problem I was looking for can only happen in Windows 8 - which does things very differently. So I'm all out of ideas, sorry.