For future reference, I always get this message whenever a new patch comes out. A reboot hasnt worked for me, neither has redownloading the game. I was playing less then an hour ago and my antivirus hasnt been updated since then. Just wondering if this is an internal error? This may be unrelated but the reason i stopped an hour ago is because my internet crashed and now that its back up LoL doesnt work :/ Just hoping someone at Riot has discovered the master cure for this. Thanks.

same problem on having a hard to connecting to server i don't know the problem it was working just fun till i started to lagg from the game and i log out then unable to anymore.?

I had the same problem since last week, and nothing helps me play it and uninstalled, reinstalled, and given him special permission, I put in as an administrator disable the firewall and nothing just because I ran out of ideas it can be.

(this was the first thread to pop up on google... for anyone to lazy to read, this is apparently an error between your OS and the LoL client.. I am using Win7)

After the September 20/21st, 2011 patch I has started getting this error? Never seen this before.

I have tried a couple things but with not much enthusiasm. I will try repairing LoL client as suggested above.

just letting you guys (Riot) know.

The guy above me isnt alone riot. Dominion...

Well that sucks, I was having fun with this game, but it looks like that's over now. Nothing I do works.

Looks like I am out of luck. Guess I'll play something else.