On my Windows Server 2003 R2 SP2 appserver, I'm forced and use both Apache 2.4 (XAMPP bundle, of course!) and IIS.
Since I've installed IIS, whilst I configured a virtual directory to run on port 81, after re-starting Apache, I'm no more able and install as a service.
Both running httpd.exe -k install and httpd.exe -k runservice results in an error message "ports 80 and 443 are already used by another socket" (even when IIS, that is, w3svc service, is stopped) and a boring "Starting..." in Windows services console, that is, services.msc.
Any way to run Apache as a service again, side-by-side with IIS?