I've been using bitfender for a while now and recently all of the updates have been failing. The other day when I rebooted my system the update was stuck, it sat there using 100% disk usage for an hour before I got frustrated and uninstalled it. I used to use avast but it eats up Internet bandwidth. So is it worth using any of the free antivirus programs or should I be ok using the built in Windows protection? Its been about a week and no problems so far.