I have a MacBook Pro I am working on with an i7 CPU and 4gigs memory running 10.10. I have ran ccleaner, and installed sophos antivirus which found one item that I removed. When logging in after putting in her password, a progress bar show below her sign in name. I have never seen this before, and can not see any programs I haven't heard of listed. Is there a better virus scanner, or does anyone have an idea what is causing that?