User blog comment:Exc0p/Help? Advice? Please!?/@comment-4260367-20120301043553

First I would try to isolate the problem and make sure it really is your internet (Sometimes it's Nexon's fault but I personally haven't had any latency problems since late last year) and not some new program or a virus, ect. (Try a single player game that uses a lot of if computer resources you have one).

Assuming it is your connection I would use Leatrix Latency Fix http://www.wowinterface.com/downloads/info13581-LeatrixLatencyFix.html or Ping enhancer (if you have WIN 7) http://www.wowinterface.com/downloads/info16336-PingEnhancer.html. Enabling TcpAckFrequency will enable your computer to send packets without bundling them first and will reduce your ping but make your connection slightly less efficient. Enabling NetworkThrottlingIndex increases the bandwidth cap that is placed on all non media applications (note that enabling TcpAckFreqency will make you use more bandwidth and NetworkThrottlingIndex could lag everyone else on your router so you may have to experiment a little with your settings. Don't mess with TcpNoDelay).

Otherwise I would use namebench http://code.google.com/p/namebench/ which will run benchmarks on some DNS servers to see if you could be using a better one (consult Google for information on how to change your DNS). Just make sure you aren't using a shady DNS address (use Google DNS, Ultra DNS or, Open DNS depending on the benchmarks if you aren't sure which ones are safe).