Wireguard client 0.2.1 on Windows 7.

[Jason A. Donenfeld]

Hi Brian,

Rats. Can you check if you already have KB2921916 installed? Can you
type at the command prompt:

    wmic qfe > sendtojason.txt

And then send me the "sendtojason.txt" file?

Is there anything unusual about your system? Which service pack? Which build?

I'm interested in learning whether:
- The detection logic for the KB we have is wrong; or
- There are some Windows 7 configs for which the KB isn't applicable; or
- If there's some way to lodge your system into this state, which we
should correct; or
- Something else?

Jason