None of the above worked for me. This is what finally worked for me:
1) Start Services (Type services in your start > search)
2) Look for Apache services.It was disabled in my case. Enabling it worked for me.
Some people have also reported duplicate listing of Apache services which has prevented it from starting. If that is the case, delete/disable one of the Apache services which corresponds to the wrong path.
A restart of XAMPP might be required.