In XAMPP control panel, it simply will not allow Apache to be in a "Running" mode. Status lines keep saying "Busy' and Running -- but it isn't. I have remove firewalls, virus checking, McAfee etc and still can't get it running. Mentions port 80. I have taken off "Svc" checks and back on. No difference. I can stop/start MySQL -- no problem . It;s just Apache that I can't get "running".
As an aside, this is installed on a freestanding laptop -- no internet connections at all. The browser installed is FireFox.