Errr...

I happened to get the same error, still i am able to play since yesterday.. (what i did??)
First i updated the game guard and it shows un-readable error
Second i still did the same and it updated another 9 patches, but it still showed un-readable error
Again i did the same and it updated another 9 patches (which i noticed their size is different from the previous one) and after it finished, i was able to play.

So i assume there is several game guard updates in 3 batches.. so try your luck..!!