I have a very strange problem with my Apache 2.4 working with Xampp 1.8.2 on Windows Server 2008 R2.
When I tried to start Apache server in XAMPP, an error message is shown:
[Apache] Problem detected!
[Apache] Port 443 in use by "Unable to open process" with PID 4!
[Apache] Apache WILL NOT start without the configured ports free!
[Apache] You need to uninstall/disable/reconfigure the blocking application
[Apache] or reconfigure Apache and the Control Panel to listen on a different port
C:\Users\Administrator>netstat -a -n -o | findstr 443
TCP 0.0.0.0:443 0.0.0.0:0 LISTENING 4
TCP [::]:443 [::]:0 LISTENING 4
I had the same problem: port-443-in-use-by-unable-to-open-process-with-pid-4
First I disabled the weather tile in Win* that apparently phones home to Redmond for updates after this showed on netstat list.
This didn't solve the problem. I looked at the post already here which mentioned VPNs, so
I went to
Control Panel\Network and Internet\Network and Sharing Center and clicked on
Change adapter settings
I clicked on
Incoming Connections and right clicked on properties
The VPN click box at the bottom of the
General tab was on, so I unchecked it
Users, I also unchecked a previous user I had allowed to copy some data weeks before
Then I clicked okay
Closed the control panel and restarted the XAMPP control panel
It fired right up without a problem.