Why wont my computer let me download anything?

There really isn't really a problem. McAfee shouldn't harm anything. But just in case, disable it. Don't uninstall it. That's a problem that I see all lot. Download everything to the desktop. You can make your file stuff. Do you have a administer account? (or 2 accounts.) If so, call the administrator for permission. If not, make a administrator account. If it still won't let you, call a technician.