I was contributing to a thread to help someone with an issue, and thought people who view this thread might take note or find this info valuable: ISP or Networking Issue? 30 days old and counting problem..
The problem was a self-installed program called Pando Media Booster. It is installed with league of legends in this case.
the following games also install the same software and could be causing unneeded bandwidth or even latency:
Other Companies Reported to Bundle Pando Media Booster With Their Product
Dungeons and Dragons Online
Lord of the Ring Online
Star Trek Online
All Points Bulletin (APB)
Other Games from GamersFirst?
Games from gpotato.com
A quick search as done in the thread above will show if PMB.exe is running on your computer.