How can I tell if a Windows 10 PC has the Anniversary Update installed?
Solution 1:
Press WinKey + R, type winver and press ENTER
If the version number reads 1607, then you have the Anniversary Update installed.
Solution 2:
You can determine this by looking at the Start menu, since the Anniversary Update changed it. Before the update, it looked like this (with words):
After the update, it looks like this (just icons):
A particularly salient difference is that the user avatar/name no longer appear at the top; rather, the avatar is above the File Explorer icon.