This message is unique to Microsoft Windows, and is generally caused by faulty firewall, antivirus, VPN, or other networking software that interferes with the correct operation of the Windows networking APIs.
In Apache httpd 2.2, you can work around this problem in Apache by using the Win32DisableAcceptEx directive to tell Apache to fall back to a more basic networking API.
In Apache httpd 2.4, use the AcceptFilter directive instead. Typically this will be:
AcceptFilter http none
AcceptFilter https none