Upon startup, I get an error message saying that CCApp can't start because it can't find atl71.dll. I hit cancel and things seem to be working o.k. Do I need this file? If so, how do I get it back?


It's hard to tell what atl7.dll is-some report it as spyware, some say it's Music Match.
The real problem may be CCApp, which is part of Norton.
See here:
I like what this guy says, as I really, really detest Norton products.
You might want to uninstall Norton and get something like AVG free. which ha served me well for years.