That's great that you found the culprit, but still, your Internet Security from Verizon is not running properly
That's important to keep it running at top notch
Do you know what exactly addon it is giving the problems?
Can you uninstall it from add/remove programs?
I'm not a big fan of yahoo products anyways
Also, to have Verizon internet security running properly again
Can you uninstall>>reboot>reinstall it
Reboot and post a new hijackthis log and let me know how things are running
It's important to ensure your AV realtime protection is running properly