STEAM: Bad CD KEY

[STEAM: Bad CD KEY]

Starting at around 1am CST today I have been unable to log into multiplayer servers.

I either time out, or get "BAD CD KEY" messages.

It was working last night.

I've rebooted,

I've Verified Cache integrity,

I'm certain I'm launching as Admin.

Still however I have this problem.

Is there a solution?

["Invalid CD Key" Op Arrow, from Amazon]

Mine still isn't fixed T-T

I have a Steam Key.

["Invalid CD Key" Op Arrow, from Amazon]

I'm also getting "BAD CD KEY" errors when attempting to play MP. My copy is from steam. Ran Data verification everything came out clean.

PLEASE FIX.