craigb-- Thanks for the quick response. I was hoping to be able to load Security Essentials on demand, but after not finding a way to start the service manually (all start-up options on the service were grayed out), I took your advice and uninstalled it.
BTW, I have often read statements like, "Running two AV's at the same time will lessen security," but am unaware of evidence to support it, at least as a general rule. [I have seen evidence that running two AVs automatically in the background can be terribly inefficient, use up lots of resources, and slow down response time.] Can anyone direct me to an authoritative source that supports the belief that having two AVs running together carries an increased security risk? Thanks.