According to a thread on Reddit, the now-defunct Pando Media Booster software is pushing out updates containing malware. If you have this installed on your system from the days when LOTRO used to use Pando, you might want to consider uninstalling it (I still had it on my system!), since LOTRO no longer uses Pando.

http://www.reddit.com/r/lotro/commen...ster_software/