The uninstall suggestion above solved my problem.
FYI, I discovered that netsession was the culprit (which led me to this thread) as a result of a suggestion on a related thread by user chrisle:
Run the following in Terminal:
sudo fs_usage
That command allowed me to see the huge number of netsession accesses.
iMac 27 (3.06 GHz Intel Core Duo), OS 10.6.8